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No longer do the pre-check on DELETE_ACCESS - we're correctly checking the ACL every...
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob575503fa62de1bc40468cebf9070dce2b80171f6
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 If the requester wanted DELETE_ACCESS and was rejected because
42 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
43 ovverrides this.
44 ****************************************************************************/
45
46 static bool parent_override_delete(connection_struct *conn,
47 const struct smb_filename *smb_fname,
48 uint32_t access_mask,
49 uint32_t rejected_mask)
50 {
51 if ((access_mask & DELETE_ACCESS) &&
52 (rejected_mask & DELETE_ACCESS) &&
53 can_delete_file_in_directory(conn, smb_fname)) {
54 return true;
55 }
56 return false;
57 }
58
59 /****************************************************************************
60 Check if we have open rights.
61 ****************************************************************************/
62
63 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
64 const struct smb_filename *smb_fname,
65 uint32_t access_mask)
66 {
67 /* Check if we have rights to open. */
68 NTSTATUS status;
69 struct security_descriptor *sd = NULL;
70 uint32_t rejected_share_access;
71 uint32_t rejected_mask = 0;
72
73 rejected_share_access = access_mask & ~(conn->share_access);
74
75 if (rejected_share_access) {
76 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
77 "on %s (0x%x)\n",
78 (unsigned int)access_mask,
79 smb_fname_str_dbg(smb_fname),
80 (unsigned int)rejected_share_access ));
81 return NT_STATUS_ACCESS_DENIED;
82 }
83
84 if (get_current_uid(conn) == (uid_t)0) {
85 /* I'm sorry sir, I didn't know you were root... */
86 DEBUG(10,("smbd_check_access_rights: root override "
87 "on %s. Granting 0x%x\n",
88 smb_fname_str_dbg(smb_fname),
89 (unsigned int)access_mask ));
90 return NT_STATUS_OK;
91 }
92
93 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
94 DEBUG(10,("smbd_check_access_rights: not checking ACL "
95 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
96 smb_fname_str_dbg(smb_fname),
97 (unsigned int)access_mask ));
98 return NT_STATUS_OK;
99 }
100
101 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
102 (SECINFO_OWNER |
103 SECINFO_GROUP |
104 SECINFO_DACL),&sd);
105
106 if (!NT_STATUS_IS_OK(status)) {
107 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
108 "on %s: %s\n",
109 smb_fname_str_dbg(smb_fname),
110 nt_errstr(status)));
111 return status;
112 }
113
114 /*
115 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
116 * owner WRITE_DAC and READ_CONTROL.
117 */
118 status = se_access_check(sd,
119 get_current_nttok(conn),
120 (access_mask & ~FILE_READ_ATTRIBUTES),
121 &rejected_mask);
122
123 DEBUG(10,("smbd_check_access_rights: file %s requesting "
124 "0x%x returning 0x%x (%s)\n",
125 smb_fname_str_dbg(smb_fname),
126 (unsigned int)access_mask,
127 (unsigned int)rejected_mask,
128 nt_errstr(status) ));
129
130 if (!NT_STATUS_IS_OK(status)) {
131 if (DEBUGLEVEL >= 10) {
132 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
133 smb_fname_str_dbg(smb_fname) ));
134 NDR_PRINT_DEBUG(security_descriptor, sd);
135 }
136 }
137
138 TALLOC_FREE(sd);
139
140 if (NT_STATUS_IS_OK(status) ||
141 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
142 return status;
143 }
144
145 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
146 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
147 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
148 (lp_map_readonly(SNUM(conn)) ||
149 lp_map_archive(SNUM(conn)) ||
150 lp_map_hidden(SNUM(conn)) ||
151 lp_map_system(SNUM(conn)))) {
152 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
153
154 DEBUG(10,("smbd_check_access_rights: "
155 "overrode "
156 "FILE_WRITE_ATTRIBUTES "
157 "on file %s\n",
158 smb_fname_str_dbg(smb_fname)));
159 }
160
161 if (parent_override_delete(conn,
162 smb_fname,
163 access_mask,
164 rejected_mask)) {
165 /* Were we trying to do an open
166 * for delete and didn't get DELETE
167 * access (only) ? Check if the
168 * directory allows DELETE_CHILD.
169 * See here:
170 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
171 * for details. */
172
173 rejected_mask &= ~DELETE_ACCESS;
174
175 DEBUG(10,("smbd_check_access_rights: "
176 "overrode "
177 "DELETE_ACCESS on "
178 "file %s\n",
179 smb_fname_str_dbg(smb_fname)));
180 }
181
182 if (rejected_mask != 0) {
183 return NT_STATUS_ACCESS_DENIED;
184 } else {
185 return NT_STATUS_OK;
186 }
187 }
188
189 static NTSTATUS check_parent_access(struct connection_struct *conn,
190 struct smb_filename *smb_fname,
191 uint32_t access_mask,
192 char **pp_parent_dir)
193 {
194 NTSTATUS status;
195 char *parent_dir = NULL;
196 struct security_descriptor *parent_sd = NULL;
197 uint32_t access_granted = 0;
198
199 if (!parent_dirname(talloc_tos(),
200 smb_fname->base_name,
201 &parent_dir,
202 NULL)) {
203 return NT_STATUS_NO_MEMORY;
204 }
205
206 if (pp_parent_dir) {
207 *pp_parent_dir = parent_dir;
208 }
209
210 if (get_current_uid(conn) == (uid_t)0) {
211 /* I'm sorry sir, I didn't know you were root... */
212 DEBUG(10,("check_parent_access: root override "
213 "on %s. Granting 0x%x\n",
214 smb_fname_str_dbg(smb_fname),
215 (unsigned int)access_mask ));
216 return NT_STATUS_OK;
217 }
218
219 status = SMB_VFS_GET_NT_ACL(conn,
220 parent_dir,
221 SECINFO_DACL,
222 &parent_sd);
223
224 if (!NT_STATUS_IS_OK(status)) {
225 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
226 "%s with error %s\n",
227 parent_dir,
228 nt_errstr(status)));
229 return status;
230 }
231
232 /*
233 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
234 * owner WRITE_DAC and READ_CONTROL.
235 */
236 status = se_access_check(parent_sd,
237 get_current_nttok(conn),
238 (access_mask & ~FILE_READ_ATTRIBUTES),
239 &access_granted);
240 if(!NT_STATUS_IS_OK(status)) {
241 DEBUG(5,("check_parent_access: access check "
242 "on directory %s for "
243 "path %s for mask 0x%x returned (0x%x) %s\n",
244 parent_dir,
245 smb_fname->base_name,
246 access_mask,
247 access_granted,
248 nt_errstr(status) ));
249 return status;
250 }
251
252 return NT_STATUS_OK;
253 }
254
255 /****************************************************************************
256 fd support routines - attempt to do a dos_open.
257 ****************************************************************************/
258
259 static NTSTATUS fd_open(struct connection_struct *conn,
260 files_struct *fsp,
261 int flags,
262 mode_t mode)
263 {
264 struct smb_filename *smb_fname = fsp->fsp_name;
265 NTSTATUS status = NT_STATUS_OK;
266
267 #ifdef O_NOFOLLOW
268 /*
269 * Never follow symlinks on a POSIX client. The
270 * client should be doing this.
271 */
272
273 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
274 flags |= O_NOFOLLOW;
275 }
276 #endif
277
278 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
279 if (fsp->fh->fd == -1) {
280 status = map_nt_error_from_unix(errno);
281 if (errno == EMFILE) {
282 static time_t last_warned = 0L;
283
284 if (time((time_t *) NULL) > last_warned) {
285 DEBUG(0,("Too many open files, unable "
286 "to open more! smbd's max "
287 "open files = %d\n",
288 lp_max_open_files()));
289 last_warned = time((time_t *) NULL);
290 }
291 }
292
293 }
294
295 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
296 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
297 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
298
299 return status;
300 }
301
302 /****************************************************************************
303 Close the file associated with a fsp.
304 ****************************************************************************/
305
306 NTSTATUS fd_close(files_struct *fsp)
307 {
308 int ret;
309
310 if (fsp->dptr) {
311 dptr_CloseDir(fsp);
312 }
313 if (fsp->fh->fd == -1) {
314 return NT_STATUS_OK; /* What we used to call a stat open. */
315 }
316 if (fsp->fh->ref_count > 1) {
317 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
318 }
319
320 ret = SMB_VFS_CLOSE(fsp);
321 fsp->fh->fd = -1;
322 if (ret == -1) {
323 return map_nt_error_from_unix(errno);
324 }
325 return NT_STATUS_OK;
326 }
327
328 /****************************************************************************
329 Change the ownership of a file to that of the parent directory.
330 Do this by fd if possible.
331 ****************************************************************************/
332
333 void change_file_owner_to_parent(connection_struct *conn,
334 const char *inherit_from_dir,
335 files_struct *fsp)
336 {
337 struct smb_filename *smb_fname_parent = NULL;
338 NTSTATUS status;
339 int ret;
340
341 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
342 NULL, NULL, &smb_fname_parent);
343 if (!NT_STATUS_IS_OK(status)) {
344 return;
345 }
346
347 ret = SMB_VFS_STAT(conn, smb_fname_parent);
348 if (ret == -1) {
349 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
350 "directory %s. Error was %s\n",
351 smb_fname_str_dbg(smb_fname_parent),
352 strerror(errno)));
353 TALLOC_FREE(smb_fname_parent);
354 return;
355 }
356
357 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
358 /* Already this uid - no need to change. */
359 DEBUG(10,("change_file_owner_to_parent: file %s "
360 "is already owned by uid %d\n",
361 fsp_str_dbg(fsp),
362 (int)fsp->fsp_name->st.st_ex_uid ));
363 TALLOC_FREE(smb_fname_parent);
364 return;
365 }
366
367 become_root();
368 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
369 unbecome_root();
370 if (ret == -1) {
371 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
372 "file %s to parent directory uid %u. Error "
373 "was %s\n", fsp_str_dbg(fsp),
374 (unsigned int)smb_fname_parent->st.st_ex_uid,
375 strerror(errno) ));
376 } else {
377 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
378 "parent directory uid %u.\n", fsp_str_dbg(fsp),
379 (unsigned int)smb_fname_parent->st.st_ex_uid));
380 /* Ensure the uid entry is updated. */
381 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
382 }
383
384 TALLOC_FREE(smb_fname_parent);
385 }
386
387 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
388 const char *inherit_from_dir,
389 const char *fname,
390 SMB_STRUCT_STAT *psbuf)
391 {
392 struct smb_filename *smb_fname_parent = NULL;
393 struct smb_filename *smb_fname_cwd = NULL;
394 char *saved_dir = NULL;
395 TALLOC_CTX *ctx = talloc_tos();
396 NTSTATUS status = NT_STATUS_OK;
397 int ret;
398
399 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
400 &smb_fname_parent);
401 if (!NT_STATUS_IS_OK(status)) {
402 return status;
403 }
404
405 ret = SMB_VFS_STAT(conn, smb_fname_parent);
406 if (ret == -1) {
407 status = map_nt_error_from_unix(errno);
408 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
409 "directory %s. Error was %s\n",
410 smb_fname_str_dbg(smb_fname_parent),
411 strerror(errno)));
412 goto out;
413 }
414
415 /* We've already done an lstat into psbuf, and we know it's a
416 directory. If we can cd into the directory and the dev/ino
417 are the same then we can safely chown without races as
418 we're locking the directory in place by being in it. This
419 should work on any UNIX (thanks tridge :-). JRA.
420 */
421
422 saved_dir = vfs_GetWd(ctx,conn);
423 if (!saved_dir) {
424 status = map_nt_error_from_unix(errno);
425 DEBUG(0,("change_dir_owner_to_parent: failed to get "
426 "current working directory. Error was %s\n",
427 strerror(errno)));
428 goto out;
429 }
430
431 /* Chdir into the new path. */
432 if (vfs_ChDir(conn, fname) == -1) {
433 status = map_nt_error_from_unix(errno);
434 DEBUG(0,("change_dir_owner_to_parent: failed to change "
435 "current working directory to %s. Error "
436 "was %s\n", fname, strerror(errno) ));
437 goto chdir;
438 }
439
440 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
441 &smb_fname_cwd);
442 if (!NT_STATUS_IS_OK(status)) {
443 return status;
444 }
445
446 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
447 if (ret == -1) {
448 status = map_nt_error_from_unix(errno);
449 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
450 "directory '.' (%s) Error was %s\n",
451 fname, strerror(errno)));
452 goto chdir;
453 }
454
455 /* Ensure we're pointing at the same place. */
456 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
457 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
458 DEBUG(0,("change_dir_owner_to_parent: "
459 "device/inode on directory %s changed. "
460 "Refusing to chown !\n", fname ));
461 status = NT_STATUS_ACCESS_DENIED;
462 goto chdir;
463 }
464
465 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
466 /* Already this uid - no need to change. */
467 DEBUG(10,("change_dir_owner_to_parent: directory %s "
468 "is already owned by uid %d\n",
469 fname,
470 (int)smb_fname_cwd->st.st_ex_uid ));
471 status = NT_STATUS_OK;
472 goto chdir;
473 }
474
475 become_root();
476 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
477 (gid_t)-1);
478 unbecome_root();
479 if (ret == -1) {
480 status = map_nt_error_from_unix(errno);
481 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
482 "directory %s to parent directory uid %u. "
483 "Error was %s\n", fname,
484 (unsigned int)smb_fname_parent->st.st_ex_uid,
485 strerror(errno) ));
486 } else {
487 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
488 "directory %s to parent directory uid %u.\n",
489 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
490 /* Ensure the uid entry is updated. */
491 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
492 }
493
494 chdir:
495 vfs_ChDir(conn,saved_dir);
496 out:
497 TALLOC_FREE(smb_fname_parent);
498 TALLOC_FREE(smb_fname_cwd);
499 return status;
500 }
501
502 /****************************************************************************
503 Open a file.
504 ****************************************************************************/
505
506 static NTSTATUS open_file(files_struct *fsp,
507 connection_struct *conn,
508 struct smb_request *req,
509 const char *parent_dir,
510 int flags,
511 mode_t unx_mode,
512 uint32 access_mask, /* client requested access mask. */
513 uint32 open_access_mask) /* what we're actually using in the open. */
514 {
515 struct smb_filename *smb_fname = fsp->fsp_name;
516 NTSTATUS status = NT_STATUS_OK;
517 int accmode = (flags & O_ACCMODE);
518 int local_flags = flags;
519 bool file_existed = VALID_STAT(fsp->fsp_name->st);
520 bool file_created = false;
521
522 fsp->fh->fd = -1;
523 errno = EPERM;
524
525 /* Check permissions */
526
527 /*
528 * This code was changed after seeing a client open request
529 * containing the open mode of (DENY_WRITE/read-only) with
530 * the 'create if not exist' bit set. The previous code
531 * would fail to open the file read only on a read-only share
532 * as it was checking the flags parameter directly against O_RDONLY,
533 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
534 * JRA.
535 */
536
537 if (!CAN_WRITE(conn)) {
538 /* It's a read-only share - fail if we wanted to write. */
539 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
540 DEBUG(3,("Permission denied opening %s\n",
541 smb_fname_str_dbg(smb_fname)));
542 return NT_STATUS_ACCESS_DENIED;
543 } else if(flags & O_CREAT) {
544 /* We don't want to write - but we must make sure that
545 O_CREAT doesn't create the file if we have write
546 access into the directory.
547 */
548 flags &= ~(O_CREAT|O_EXCL);
549 local_flags &= ~(O_CREAT|O_EXCL);
550 }
551 }
552
553 /*
554 * This little piece of insanity is inspired by the
555 * fact that an NT client can open a file for O_RDONLY,
556 * but set the create disposition to FILE_EXISTS_TRUNCATE.
557 * If the client *can* write to the file, then it expects to
558 * truncate the file, even though it is opening for readonly.
559 * Quicken uses this stupid trick in backup file creation...
560 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
561 * for helping track this one down. It didn't bite us in 2.0.x
562 * as we always opened files read-write in that release. JRA.
563 */
564
565 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
566 DEBUG(10,("open_file: truncate requested on read-only open "
567 "for file %s\n", smb_fname_str_dbg(smb_fname)));
568 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
569 }
570
571 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
572 (!file_existed && (local_flags & O_CREAT)) ||
573 ((local_flags & O_TRUNC) == O_TRUNC) ) {
574 const char *wild;
575
576 /*
577 * We can't actually truncate here as the file may be locked.
578 * open_file_ntcreate will take care of the truncate later. JRA.
579 */
580
581 local_flags &= ~O_TRUNC;
582
583 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
584 /*
585 * We would block on opening a FIFO with no one else on the
586 * other end. Do what we used to do and add O_NONBLOCK to the
587 * open flags. JRA.
588 */
589
590 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
591 local_flags |= O_NONBLOCK;
592 }
593 #endif
594
595 /* Don't create files with Microsoft wildcard characters. */
596 if (fsp->base_fsp) {
597 /*
598 * wildcard characters are allowed in stream names
599 * only test the basefilename
600 */
601 wild = fsp->base_fsp->fsp_name->base_name;
602 } else {
603 wild = smb_fname->base_name;
604 }
605 if ((local_flags & O_CREAT) && !file_existed &&
606 ms_has_wild(wild)) {
607 return NT_STATUS_OBJECT_NAME_INVALID;
608 }
609
610 /* Can we access this file ? */
611 if (!fsp->base_fsp) {
612 /* Only do this check on non-stream open. */
613 if (file_existed) {
614 status = smbd_check_access_rights(conn,
615 smb_fname,
616 access_mask);
617 } else if (local_flags & O_CREAT){
618 status = check_parent_access(conn,
619 smb_fname,
620 SEC_DIR_ADD_FILE,
621 NULL);
622 } else {
623 /* File didn't exist and no O_CREAT. */
624 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
625 }
626 if (!NT_STATUS_IS_OK(status)) {
627 DEBUG(10,("open_file: "
628 "%s on file "
629 "%s returned %s\n",
630 file_existed ?
631 "smbd_check_access_rights" :
632 "check_parent_access",
633 smb_fname_str_dbg(smb_fname),
634 nt_errstr(status) ));
635 return status;
636 }
637 }
638
639 /* Actually do the open */
640 status = fd_open(conn, fsp, local_flags, unx_mode);
641 if (!NT_STATUS_IS_OK(status)) {
642 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
643 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
644 nt_errstr(status),local_flags,flags));
645 return status;
646 }
647
648 if ((local_flags & O_CREAT) && !file_existed) {
649 file_created = true;
650 }
651
652 } else {
653 fsp->fh->fd = -1; /* What we used to call a stat open. */
654 if (!file_existed) {
655 /* File must exist for a stat open. */
656 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
657 }
658
659 status = smbd_check_access_rights(conn,
660 smb_fname,
661 access_mask);
662
663 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
664 fsp->posix_open &&
665 S_ISLNK(smb_fname->st.st_ex_mode)) {
666 /* This is a POSIX stat open for delete
667 * or rename on a symlink that points
668 * nowhere. Allow. */
669 DEBUG(10,("open_file: allowing POSIX "
670 "open on bad symlink %s\n",
671 smb_fname_str_dbg(smb_fname)));
672 status = NT_STATUS_OK;
673 }
674
675 if (!NT_STATUS_IS_OK(status)) {
676 DEBUG(10,("open_file: "
677 "smbd_check_access_rights on file "
678 "%s returned %s\n",
679 smb_fname_str_dbg(smb_fname),
680 nt_errstr(status) ));
681 return status;
682 }
683 }
684
685 if (!file_existed) {
686 int ret;
687
688 if (fsp->fh->fd == -1) {
689 ret = SMB_VFS_STAT(conn, smb_fname);
690 } else {
691 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
692 /* If we have an fd, this stat should succeed. */
693 if (ret == -1) {
694 DEBUG(0,("Error doing fstat on open file %s "
695 "(%s)\n",
696 smb_fname_str_dbg(smb_fname),
697 strerror(errno) ));
698 }
699 }
700
701 /* For a non-io open, this stat failing means file not found. JRA */
702 if (ret == -1) {
703 status = map_nt_error_from_unix(errno);
704 fd_close(fsp);
705 return status;
706 }
707
708 if (file_created) {
709 bool need_re_stat = false;
710 /* Do all inheritance work after we've
711 done a successful stat call and filled
712 in the stat struct in fsp->fsp_name. */
713
714 /* Inherit the ACL if required */
715 if (lp_inherit_perms(SNUM(conn))) {
716 inherit_access_posix_acl(conn, parent_dir,
717 smb_fname->base_name,
718 unx_mode);
719 need_re_stat = true;
720 }
721
722 /* Change the owner if required. */
723 if (lp_inherit_owner(SNUM(conn))) {
724 change_file_owner_to_parent(conn, parent_dir,
725 fsp);
726 need_re_stat = true;
727 }
728
729 if (need_re_stat) {
730 if (fsp->fh->fd == -1) {
731 ret = SMB_VFS_STAT(conn, smb_fname);
732 } else {
733 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
734 /* If we have an fd, this stat should succeed. */
735 if (ret == -1) {
736 DEBUG(0,("Error doing fstat on open file %s "
737 "(%s)\n",
738 smb_fname_str_dbg(smb_fname),
739 strerror(errno) ));
740 }
741 }
742 }
743
744 notify_fname(conn, NOTIFY_ACTION_ADDED,
745 FILE_NOTIFY_CHANGE_FILE_NAME,
746 smb_fname->base_name);
747 }
748 }
749
750 /*
751 * POSIX allows read-only opens of directories. We don't
752 * want to do this (we use a different code path for this)
753 * so catch a directory open and return an EISDIR. JRA.
754 */
755
756 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
757 fd_close(fsp);
758 errno = EISDIR;
759 return NT_STATUS_FILE_IS_A_DIRECTORY;
760 }
761
762 fsp->mode = smb_fname->st.st_ex_mode;
763 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
764 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
765 fsp->file_pid = req ? req->smbpid : 0;
766 fsp->can_lock = True;
767 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
768 if (!CAN_WRITE(conn)) {
769 fsp->can_write = False;
770 } else {
771 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
772 True : False;
773 }
774 fsp->print_file = NULL;
775 fsp->modified = False;
776 fsp->sent_oplock_break = NO_BREAK_SENT;
777 fsp->is_directory = False;
778 if (conn->aio_write_behind_list &&
779 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
780 conn->case_sensitive)) {
781 fsp->aio_write_behind = True;
782 }
783
784 fsp->wcp = NULL; /* Write cache pointer. */
785
786 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
787 conn->session_info->unix_info->unix_name,
788 smb_fname_str_dbg(smb_fname),
789 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
790 conn->num_files_open));
791
792 errno = 0;
793 return NT_STATUS_OK;
794 }
795
796 /****************************************************************************
797 Check if we can open a file with a share mode.
798 Returns True if conflict, False if not.
799 ****************************************************************************/
800
801 static bool share_conflict(struct share_mode_entry *entry,
802 uint32 access_mask,
803 uint32 share_access)
804 {
805 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
806 "entry->share_access = 0x%x, "
807 "entry->private_options = 0x%x\n",
808 (unsigned int)entry->access_mask,
809 (unsigned int)entry->share_access,
810 (unsigned int)entry->private_options));
811
812 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
813 (unsigned int)access_mask, (unsigned int)share_access));
814
815 if ((entry->access_mask & (FILE_WRITE_DATA|
816 FILE_APPEND_DATA|
817 FILE_READ_DATA|
818 FILE_EXECUTE|
819 DELETE_ACCESS)) == 0) {
820 DEBUG(10,("share_conflict: No conflict due to "
821 "entry->access_mask = 0x%x\n",
822 (unsigned int)entry->access_mask ));
823 return False;
824 }
825
826 if ((access_mask & (FILE_WRITE_DATA|
827 FILE_APPEND_DATA|
828 FILE_READ_DATA|
829 FILE_EXECUTE|
830 DELETE_ACCESS)) == 0) {
831 DEBUG(10,("share_conflict: No conflict due to "
832 "access_mask = 0x%x\n",
833 (unsigned int)access_mask ));
834 return False;
835 }
836
837 #if 1 /* JRA TEST - Superdebug. */
838 #define CHECK_MASK(num, am, right, sa, share) \
839 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
840 (unsigned int)(num), (unsigned int)(am), \
841 (unsigned int)(right), (unsigned int)(am)&(right) )); \
842 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
843 (unsigned int)(num), (unsigned int)(sa), \
844 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
845 if (((am) & (right)) && !((sa) & (share))) { \
846 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
847 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
848 (unsigned int)(share) )); \
849 return True; \
850 }
851 #else
852 #define CHECK_MASK(num, am, right, sa, share) \
853 if (((am) & (right)) && !((sa) & (share))) { \
854 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
855 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
856 (unsigned int)(share) )); \
857 return True; \
858 }
859 #endif
860
861 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
862 share_access, FILE_SHARE_WRITE);
863 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
864 entry->share_access, FILE_SHARE_WRITE);
865
866 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
867 share_access, FILE_SHARE_READ);
868 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
869 entry->share_access, FILE_SHARE_READ);
870
871 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
872 share_access, FILE_SHARE_DELETE);
873 CHECK_MASK(6, access_mask, DELETE_ACCESS,
874 entry->share_access, FILE_SHARE_DELETE);
875
876 DEBUG(10,("share_conflict: No conflict.\n"));
877 return False;
878 }
879
880 #if defined(DEVELOPER)
881 static void validate_my_share_entries(struct smbd_server_connection *sconn,
882 int num,
883 struct share_mode_entry *share_entry)
884 {
885 files_struct *fsp;
886
887 if (!procid_is_me(&share_entry->pid)) {
888 return;
889 }
890
891 if (is_deferred_open_entry(share_entry) &&
892 !open_was_deferred(sconn, share_entry->op_mid)) {
893 char *str = talloc_asprintf(talloc_tos(),
894 "Got a deferred entry without a request: "
895 "PANIC: %s\n",
896 share_mode_str(talloc_tos(), num, share_entry));
897 smb_panic(str);
898 }
899
900 if (!is_valid_share_mode_entry(share_entry)) {
901 return;
902 }
903
904 fsp = file_find_dif(sconn, share_entry->id,
905 share_entry->share_file_id);
906 if (!fsp) {
907 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
908 share_mode_str(talloc_tos(), num, share_entry) ));
909 smb_panic("validate_my_share_entries: Cannot match a "
910 "share entry with an open file\n");
911 }
912
913 if (is_deferred_open_entry(share_entry) ||
914 is_unused_share_mode_entry(share_entry)) {
915 goto panic;
916 }
917
918 if ((share_entry->op_type == NO_OPLOCK) &&
919 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
920 /* Someone has already written to it, but I haven't yet
921 * noticed */
922 return;
923 }
924
925 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
926 goto panic;
927 }
928
929 return;
930
931 panic:
932 {
933 char *str;
934 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
935 share_mode_str(talloc_tos(), num, share_entry) ));
936 str = talloc_asprintf(talloc_tos(),
937 "validate_my_share_entries: "
938 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
939 fsp->fsp_name->base_name,
940 (unsigned int)fsp->oplock_type,
941 (unsigned int)share_entry->op_type );
942 smb_panic(str);
943 }
944 }
945 #endif
946
947 bool is_stat_open(uint32 access_mask)
948 {
949 return (access_mask &&
950 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
951 FILE_WRITE_ATTRIBUTES))==0) &&
952 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
953 FILE_WRITE_ATTRIBUTES)) != 0));
954 }
955
956 /****************************************************************************
957 Deal with share modes
958 Invarient: Share mode must be locked on entry and exit.
959 Returns -1 on error, or number of share modes on success (may be zero).
960 ****************************************************************************/
961
962 static NTSTATUS open_mode_check(connection_struct *conn,
963 struct share_mode_lock *lck,
964 uint32_t name_hash,
965 uint32 access_mask,
966 uint32 share_access,
967 uint32 create_options,
968 bool *file_existed)
969 {
970 int i;
971
972 if(lck->num_share_modes == 0) {
973 return NT_STATUS_OK;
974 }
975
976 *file_existed = True;
977
978 /* A delete on close prohibits everything */
979
980 if (is_delete_on_close_set(lck, name_hash)) {
981 return NT_STATUS_DELETE_PENDING;
982 }
983
984 if (is_stat_open(access_mask)) {
985 /* Stat open that doesn't trigger oplock breaks or share mode
986 * checks... ! JRA. */
987 return NT_STATUS_OK;
988 }
989
990 /*
991 * Check if the share modes will give us access.
992 */
993
994 #if defined(DEVELOPER)
995 for(i = 0; i < lck->num_share_modes; i++) {
996 validate_my_share_entries(conn->sconn, i,
997 &lck->share_modes[i]);
998 }
999 #endif
1000
1001 if (!lp_share_modes(SNUM(conn))) {
1002 return NT_STATUS_OK;
1003 }
1004
1005 /* Now we check the share modes, after any oplock breaks. */
1006 for(i = 0; i < lck->num_share_modes; i++) {
1007
1008 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1009 continue;
1010 }
1011
1012 /* someone else has a share lock on it, check to see if we can
1013 * too */
1014 if (share_conflict(&lck->share_modes[i],
1015 access_mask, share_access)) {
1016 return NT_STATUS_SHARING_VIOLATION;
1017 }
1018 }
1019
1020 return NT_STATUS_OK;
1021 }
1022
1023 static bool is_delete_request(files_struct *fsp) {
1024 return ((fsp->access_mask == DELETE_ACCESS) &&
1025 (fsp->oplock_type == NO_OPLOCK));
1026 }
1027
1028 /*
1029 * Send a break message to the oplock holder and delay the open for
1030 * our client.
1031 */
1032
1033 static NTSTATUS send_break_message(files_struct *fsp,
1034 struct share_mode_entry *exclusive,
1035 uint64_t mid,
1036 int oplock_request)
1037 {
1038 NTSTATUS status;
1039 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1040
1041 DEBUG(10, ("Sending break request to PID %s\n",
1042 procid_str_static(&exclusive->pid)));
1043 exclusive->op_mid = mid;
1044
1045 /* Create the message. */
1046 share_mode_entry_to_message(msg, exclusive);
1047
1048 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1049 don't want this set in the share mode struct pointed to by lck. */
1050
1051 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1052 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1053 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1054 }
1055
1056 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1057 MSG_SMB_BREAK_REQUEST,
1058 (uint8 *)msg,
1059 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1060 if (!NT_STATUS_IS_OK(status)) {
1061 DEBUG(3, ("Could not send oplock break message: %s\n",
1062 nt_errstr(status)));
1063 }
1064
1065 return status;
1066 }
1067
1068 /*
1069 * Return share_mode_entry pointers for :
1070 * 1). Batch oplock entry.
1071 * 2). Batch or exclusive oplock entry (may be identical to #1).
1072 * bool have_level2_oplock
1073 * bool have_no_oplock.
1074 * Do internal consistency checks on the share mode for a file.
1075 */
1076
1077 static void find_oplock_types(files_struct *fsp,
1078 int oplock_request,
1079 struct share_mode_lock *lck,
1080 struct share_mode_entry **pp_batch,
1081 struct share_mode_entry **pp_ex_or_batch,
1082 bool *got_level2,
1083 bool *got_no_oplock)
1084 {
1085 int i;
1086
1087 *pp_batch = NULL;
1088 *pp_ex_or_batch = NULL;
1089 *got_level2 = false;
1090 *got_no_oplock = false;
1091
1092 /* Ignore stat or internal opens, as is done in
1093 delay_for_batch_oplocks() and
1094 delay_for_exclusive_oplocks().
1095 */
1096 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1097 return;
1098 }
1099
1100 for (i=0; i<lck->num_share_modes; i++) {
1101 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1102 continue;
1103 }
1104
1105 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1106 is_stat_open(lck->share_modes[i].access_mask)) {
1107 /* We ignore stat opens in the table - they
1108 always have NO_OPLOCK and never get or
1109 cause breaks. JRA. */
1110 continue;
1111 }
1112
1113 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1114 /* batch - can only be one. */
1115 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1116 smb_panic("Bad batch oplock entry.");
1117 }
1118 *pp_batch = &lck->share_modes[i];
1119 }
1120
1121 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1122 /* Exclusive or batch - can only be one. */
1123 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1124 smb_panic("Bad exclusive or batch oplock entry.");
1125 }
1126 *pp_ex_or_batch = &lck->share_modes[i];
1127 }
1128
1129 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1130 if (*pp_batch || *pp_ex_or_batch) {
1131 smb_panic("Bad levelII oplock entry.");
1132 }
1133 *got_level2 = true;
1134 }
1135
1136 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1137 if (*pp_batch || *pp_ex_or_batch) {
1138 smb_panic("Bad no oplock entry.");
1139 }
1140 *got_no_oplock = true;
1141 }
1142 }
1143 }
1144
1145 static bool delay_for_batch_oplocks(files_struct *fsp,
1146 uint64_t mid,
1147 int oplock_request,
1148 struct share_mode_entry *batch_entry)
1149 {
1150 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1151 return false;
1152 }
1153
1154 if (batch_entry != NULL) {
1155 /* Found a batch oplock */
1156 send_break_message(fsp, batch_entry, mid, oplock_request);
1157 return true;
1158 }
1159 return false;
1160 }
1161
1162 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1163 uint64_t mid,
1164 int oplock_request,
1165 struct share_mode_entry *ex_entry)
1166 {
1167 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1168 return false;
1169 }
1170
1171 if (ex_entry != NULL) {
1172 /* Found an exclusive or batch oplock */
1173 bool delay_it = is_delete_request(fsp) ?
1174 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1175 if (delay_it) {
1176 send_break_message(fsp, ex_entry, mid, oplock_request);
1177 return true;
1178 }
1179 }
1180 return false;
1181 }
1182
1183 static void grant_fsp_oplock_type(files_struct *fsp,
1184 const struct byte_range_lock *br_lck,
1185 int oplock_request,
1186 bool got_level2_oplock,
1187 bool got_a_none_oplock)
1188 {
1189 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1190 lp_level2_oplocks(SNUM(fsp->conn));
1191
1192 /* Start by granting what the client asked for,
1193 but ensure no SAMBA_PRIVATE bits can be set. */
1194 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1195
1196 if (oplock_request & INTERNAL_OPEN_ONLY) {
1197 /* No oplocks on internal open. */
1198 fsp->oplock_type = NO_OPLOCK;
1199 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1200 fsp->oplock_type, fsp_str_dbg(fsp)));
1201 return;
1202 } else if (br_lck && br_lck->num_locks > 0) {
1203 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1204 fsp_str_dbg(fsp)));
1205 fsp->oplock_type = NO_OPLOCK;
1206 }
1207
1208 if (is_stat_open(fsp->access_mask)) {
1209 /* Leave the value already set. */
1210 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1211 fsp->oplock_type, fsp_str_dbg(fsp)));
1212 return;
1213 }
1214
1215 /*
1216 * Match what was requested (fsp->oplock_type) with
1217 * what was found in the existing share modes.
1218 */
1219
1220 if (got_a_none_oplock) {
1221 fsp->oplock_type = NO_OPLOCK;
1222 } else if (got_level2_oplock) {
1223 if (fsp->oplock_type == NO_OPLOCK ||
1224 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1225 /* Store a level2 oplock, but don't tell the client */
1226 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1227 } else {
1228 fsp->oplock_type = LEVEL_II_OPLOCK;
1229 }
1230 } else {
1231 /* All share_mode_entries are placeholders or deferred.
1232 * Silently upgrade to fake levelII if the client didn't
1233 * ask for an oplock. */
1234 if (fsp->oplock_type == NO_OPLOCK) {
1235 /* Store a level2 oplock, but don't tell the client */
1236 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1237 }
1238 }
1239
1240 /*
1241 * Don't grant level2 to clients that don't want them
1242 * or if we've turned them off.
1243 */
1244 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1245 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1246 }
1247
1248 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1249 fsp->oplock_type, fsp_str_dbg(fsp)));
1250 }
1251
1252 bool request_timed_out(struct timeval request_time,
1253 struct timeval timeout)
1254 {
1255 struct timeval now, end_time;
1256 GetTimeOfDay(&now);
1257 end_time = timeval_sum(&request_time, &timeout);
1258 return (timeval_compare(&end_time, &now) < 0);
1259 }
1260
1261 /****************************************************************************
1262 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1263 ****************************************************************************/
1264
1265 static void defer_open(struct share_mode_lock *lck,
1266 struct timeval request_time,
1267 struct timeval timeout,
1268 struct smb_request *req,
1269 struct deferred_open_record *state)
1270 {
1271 int i;
1272
1273 /* Paranoia check */
1274
1275 for (i=0; i<lck->num_share_modes; i++) {
1276 struct share_mode_entry *e = &lck->share_modes[i];
1277
1278 if (!is_deferred_open_entry(e)) {
1279 continue;
1280 }
1281
1282 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1283 DEBUG(0, ("Trying to defer an already deferred "
1284 "request: mid=%llu, exiting\n",
1285 (unsigned long long)req->mid));
1286 exit_server("attempt to defer a deferred request");
1287 }
1288 }
1289
1290 /* End paranoia check */
1291
1292 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1293 "open entry for mid %llu\n",
1294 (unsigned int)request_time.tv_sec,
1295 (unsigned int)request_time.tv_usec,
1296 (unsigned long long)req->mid));
1297
1298 if (!push_deferred_open_message_smb(req, request_time, timeout,
1299 state->id, (char *)state, sizeof(*state))) {
1300 exit_server("push_deferred_open_message_smb failed");
1301 }
1302 add_deferred_open(lck, req->mid, request_time,
1303 sconn_server_id(req->sconn), state->id);
1304 }
1305
1306
1307 /****************************************************************************
1308 On overwrite open ensure that the attributes match.
1309 ****************************************************************************/
1310
1311 bool open_match_attributes(connection_struct *conn,
1312 uint32 old_dos_attr,
1313 uint32 new_dos_attr,
1314 mode_t existing_unx_mode,
1315 mode_t new_unx_mode,
1316 mode_t *returned_unx_mode)
1317 {
1318 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1319
1320 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1321 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1322
1323 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1324 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1325 *returned_unx_mode = new_unx_mode;
1326 } else {
1327 *returned_unx_mode = (mode_t)0;
1328 }
1329
1330 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1331 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1332 "returned_unx_mode = 0%o\n",
1333 (unsigned int)old_dos_attr,
1334 (unsigned int)existing_unx_mode,
1335 (unsigned int)new_dos_attr,
1336 (unsigned int)*returned_unx_mode ));
1337
1338 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1339 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1340 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1341 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1342 return False;
1343 }
1344 }
1345 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1346 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1347 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1348 return False;
1349 }
1350 }
1351 return True;
1352 }
1353
1354 /****************************************************************************
1355 Special FCB or DOS processing in the case of a sharing violation.
1356 Try and find a duplicated file handle.
1357 ****************************************************************************/
1358
1359 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1360 connection_struct *conn,
1361 files_struct *fsp_to_dup_into,
1362 const struct smb_filename *smb_fname,
1363 struct file_id id,
1364 uint16 file_pid,
1365 uint16 vuid,
1366 uint32 access_mask,
1367 uint32 share_access,
1368 uint32 create_options)
1369 {
1370 files_struct *fsp;
1371
1372 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1373 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1374
1375 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1376 fsp = file_find_di_next(fsp)) {
1377
1378 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1379 "vuid = %u, file_pid = %u, private_options = 0x%x "
1380 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1381 fsp->fh->fd, (unsigned int)fsp->vuid,
1382 (unsigned int)fsp->file_pid,
1383 (unsigned int)fsp->fh->private_options,
1384 (unsigned int)fsp->access_mask ));
1385
1386 if (fsp->fh->fd != -1 &&
1387 fsp->vuid == vuid &&
1388 fsp->file_pid == file_pid &&
1389 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1390 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1391 (fsp->access_mask & FILE_WRITE_DATA) &&
1392 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1393 strequal(fsp->fsp_name->stream_name,
1394 smb_fname->stream_name)) {
1395 DEBUG(10,("fcb_or_dos_open: file match\n"));
1396 break;
1397 }
1398 }
1399
1400 if (!fsp) {
1401 return NT_STATUS_NOT_FOUND;
1402 }
1403
1404 /* quite an insane set of semantics ... */
1405 if (is_executable(smb_fname->base_name) &&
1406 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1407 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1408 return NT_STATUS_INVALID_PARAMETER;
1409 }
1410
1411 /* We need to duplicate this fsp. */
1412 return dup_file_fsp(req, fsp, access_mask, share_access,
1413 create_options, fsp_to_dup_into);
1414 }
1415
1416 static void schedule_defer_open(struct share_mode_lock *lck,
1417 struct timeval request_time,
1418 struct smb_request *req)
1419 {
1420 struct deferred_open_record state;
1421
1422 /* This is a relative time, added to the absolute
1423 request_time value to get the absolute timeout time.
1424 Note that if this is the second or greater time we enter
1425 this codepath for this particular request mid then
1426 request_time is left as the absolute time of the *first*
1427 time this request mid was processed. This is what allows
1428 the request to eventually time out. */
1429
1430 struct timeval timeout;
1431
1432 /* Normally the smbd we asked should respond within
1433 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1434 * the client did, give twice the timeout as a safety
1435 * measure here in case the other smbd is stuck
1436 * somewhere else. */
1437
1438 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1439
1440 /* Nothing actually uses state.delayed_for_oplocks
1441 but it's handy to differentiate in debug messages
1442 between a 30 second delay due to oplock break, and
1443 a 1 second delay for share mode conflicts. */
1444
1445 state.delayed_for_oplocks = True;
1446 state.id = lck->id;
1447
1448 if (!request_timed_out(request_time, timeout)) {
1449 defer_open(lck, request_time, timeout, req, &state);
1450 }
1451 }
1452
1453 /****************************************************************************
1454 Work out what access_mask to use from what the client sent us.
1455 ****************************************************************************/
1456
1457 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1458 const struct smb_filename *smb_fname,
1459 bool file_existed,
1460 uint32_t access_mask,
1461 uint32_t *access_mask_out)
1462 {
1463 NTSTATUS status;
1464 uint32_t orig_access_mask = access_mask;
1465 uint32_t rejected_share_access;
1466
1467 /*
1468 * Convert GENERIC bits to specific bits.
1469 */
1470
1471 se_map_generic(&access_mask, &file_generic_mapping);
1472
1473 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1474 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1475 if (get_current_uid(conn) == (uid_t)0) {
1476 access_mask |= FILE_GENERIC_ALL;
1477 } else if (file_existed) {
1478
1479 struct security_descriptor *sd;
1480 uint32_t access_granted = 0;
1481
1482 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1483 (SECINFO_OWNER |
1484 SECINFO_GROUP |
1485 SECINFO_DACL),&sd);
1486
1487 if (!NT_STATUS_IS_OK(status)) {
1488 DEBUG(10,("smbd_calculate_access_mask: "
1489 "Could not get acl on file %s: %s\n",
1490 smb_fname_str_dbg(smb_fname),
1491 nt_errstr(status)));
1492 return NT_STATUS_ACCESS_DENIED;
1493 }
1494
1495 /*
1496 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1497 * also takes care of owner WRITE_DAC and READ_CONTROL.
1498 */
1499 status = se_access_check(sd,
1500 get_current_nttok(conn),
1501 (access_mask & ~FILE_READ_ATTRIBUTES),
1502 &access_granted);
1503
1504 TALLOC_FREE(sd);
1505
1506 if (!NT_STATUS_IS_OK(status)) {
1507 DEBUG(10, ("smbd_calculate_access_mask: "
1508 "Access denied on file %s: "
1509 "when calculating maximum access\n",
1510 smb_fname_str_dbg(smb_fname)));
1511 return NT_STATUS_ACCESS_DENIED;
1512 }
1513
1514 access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1515 } else {
1516 access_mask = FILE_GENERIC_ALL;
1517 }
1518
1519 access_mask &= conn->share_access;
1520 }
1521
1522 rejected_share_access = access_mask & ~(conn->share_access);
1523
1524 if (rejected_share_access) {
1525 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1526 "file %s: rejected by share access mask[0x%08X] "
1527 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1528 smb_fname_str_dbg(smb_fname),
1529 conn->share_access,
1530 orig_access_mask, access_mask,
1531 rejected_share_access));
1532 return NT_STATUS_ACCESS_DENIED;
1533 }
1534
1535 *access_mask_out = access_mask;
1536 return NT_STATUS_OK;
1537 }
1538
1539 /****************************************************************************
1540 Remove the deferred open entry under lock.
1541 ****************************************************************************/
1542
1543 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1544 struct server_id pid)
1545 {
1546 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1547 NULL, NULL, NULL);
1548 if (lck == NULL) {
1549 DEBUG(0, ("could not get share mode lock\n"));
1550 } else {
1551 del_deferred_open_entry(lck, mid, pid);
1552 TALLOC_FREE(lck);
1553 }
1554 }
1555
1556 /****************************************************************
1557 Ensure we get the brlock lock followed by the share mode lock
1558 in the correct order to prevent deadlocks if other smbd's are
1559 using the brlock database on this file simultaneously with this open
1560 (that code also gets the locks in brlock -> share mode lock order).
1561 ****************************************************************/
1562
1563 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1564 files_struct *fsp,
1565 const struct file_id id,
1566 const char *connectpath,
1567 const struct smb_filename *smb_fname,
1568 const struct timespec *p_old_write_time,
1569 struct share_mode_lock **p_lck,
1570 struct byte_range_lock **p_br_lck)
1571 {
1572 /* Ordering - we must get the br_lck for this
1573 file before the share mode. */
1574 if (lp_locking(fsp->conn->params)) {
1575 *p_br_lck = brl_get_locks_readonly(fsp);
1576 if (*p_br_lck == NULL) {
1577 DEBUG(0, ("Could not get br_lock\n"));
1578 return false;
1579 }
1580 /* Note - we don't need to free the returned
1581 br_lck explicitly as it was allocated on talloc_tos()
1582 and so will be autofreed (and release the lock)
1583 once the frame context disappears.
1584
1585 If it was set to fsp->brlock_rec then it was
1586 talloc_move'd to hang off the fsp pointer and
1587 in this case is guarenteed to not be holding the
1588 lock on the brlock database. */
1589 }
1590
1591 *p_lck = get_share_mode_lock(mem_ctx,
1592 id,
1593 connectpath,
1594 smb_fname,
1595 p_old_write_time);
1596
1597 if (*p_lck == NULL) {
1598 DEBUG(0, ("Could not get share mode lock\n"));
1599 TALLOC_FREE(*p_br_lck);
1600 return false;
1601 }
1602 return true;
1603 }
1604
1605 /****************************************************************************
1606 Open a file with a share mode. Passed in an already created files_struct *.
1607 ****************************************************************************/
1608
1609 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1610 struct smb_request *req,
1611 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1612 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1613 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1614 uint32 create_options, /* options such as delete on close. */
1615 uint32 new_dos_attributes, /* attributes used for new file. */
1616 int oplock_request, /* internal Samba oplock codes. */
1617 /* Information (FILE_EXISTS etc.) */
1618 uint32_t private_flags, /* Samba specific flags. */
1619 int *pinfo,
1620 files_struct *fsp)
1621 {
1622 struct smb_filename *smb_fname = fsp->fsp_name;
1623 int flags=0;
1624 int flags2=0;
1625 bool file_existed = VALID_STAT(smb_fname->st);
1626 bool def_acl = False;
1627 bool posix_open = False;
1628 bool new_file_created = False;
1629 bool clear_ads = false;
1630 struct file_id id;
1631 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1632 mode_t new_unx_mode = (mode_t)0;
1633 mode_t unx_mode = (mode_t)0;
1634 int info;
1635 uint32 existing_dos_attributes = 0;
1636 struct timeval request_time = timeval_zero();
1637 struct share_mode_lock *lck = NULL;
1638 uint32 open_access_mask = access_mask;
1639 NTSTATUS status;
1640 char *parent_dir;
1641
1642 ZERO_STRUCT(id);
1643
1644 if (conn->printer) {
1645 /*
1646 * Printers are handled completely differently.
1647 * Most of the passed parameters are ignored.
1648 */
1649
1650 if (pinfo) {
1651 *pinfo = FILE_WAS_CREATED;
1652 }
1653
1654 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1655 smb_fname_str_dbg(smb_fname)));
1656
1657 if (!req) {
1658 DEBUG(0,("open_file_ntcreate: printer open without "
1659 "an SMB request!\n"));
1660 return NT_STATUS_INTERNAL_ERROR;
1661 }
1662
1663 return print_spool_open(fsp, smb_fname->base_name,
1664 req->vuid);
1665 }
1666
1667 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1668 NULL)) {
1669 return NT_STATUS_NO_MEMORY;
1670 }
1671
1672 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1673 posix_open = True;
1674 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1675 new_dos_attributes = 0;
1676 } else {
1677 /* Windows allows a new file to be created and
1678 silently removes a FILE_ATTRIBUTE_DIRECTORY
1679 sent by the client. Do the same. */
1680
1681 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1682
1683 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1684 * created new. */
1685 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1686 smb_fname, parent_dir);
1687 }
1688
1689 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1690 "access_mask=0x%x share_access=0x%x "
1691 "create_disposition = 0x%x create_options=0x%x "
1692 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1693 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1694 access_mask, share_access, create_disposition,
1695 create_options, (unsigned int)unx_mode, oplock_request,
1696 (unsigned int)private_flags));
1697
1698 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1699 DEBUG(0, ("No smb request but not an internal only open!\n"));
1700 return NT_STATUS_INTERNAL_ERROR;
1701 }
1702
1703 /*
1704 * Only non-internal opens can be deferred at all
1705 */
1706
1707 if (req) {
1708 void *ptr;
1709 if (get_deferred_open_message_state(req,
1710 &request_time,
1711 &ptr)) {
1712
1713 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1714 /* Remember the absolute time of the original
1715 request with this mid. We'll use it later to
1716 see if this has timed out. */
1717
1718 /* Remove the deferred open entry under lock. */
1719 remove_deferred_open_entry(
1720 state->id, req->mid,
1721 sconn_server_id(req->sconn));
1722
1723 /* Ensure we don't reprocess this message. */
1724 remove_deferred_open_message_smb(req->sconn, req->mid);
1725 }
1726 }
1727
1728 status = check_name(conn, smb_fname->base_name);
1729 if (!NT_STATUS_IS_OK(status)) {
1730 return status;
1731 }
1732
1733 if (!posix_open) {
1734 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1735 if (file_existed) {
1736 existing_dos_attributes = dos_mode(conn, smb_fname);
1737 }
1738 }
1739
1740 /* ignore any oplock requests if oplocks are disabled */
1741 if (!lp_oplocks(SNUM(conn)) ||
1742 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1743 /* Mask off everything except the private Samba bits. */
1744 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1745 }
1746
1747 /* this is for OS/2 long file names - say we don't support them */
1748 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1749 /* OS/2 Workplace shell fix may be main code stream in a later
1750 * release. */
1751 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1752 "supported.\n"));
1753 if (use_nt_status()) {
1754 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1755 }
1756 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1757 }
1758
1759 switch( create_disposition ) {
1760 /*
1761 * Currently we're using FILE_SUPERSEDE as the same as
1762 * FILE_OVERWRITE_IF but they really are
1763 * different. FILE_SUPERSEDE deletes an existing file
1764 * (requiring delete access) then recreates it.
1765 */
1766 case FILE_SUPERSEDE:
1767 /* If file exists replace/overwrite. If file doesn't
1768 * exist create. */
1769 flags2 |= (O_CREAT | O_TRUNC);
1770 clear_ads = true;
1771 break;
1772
1773 case FILE_OVERWRITE_IF:
1774 /* If file exists replace/overwrite. If file doesn't
1775 * exist create. */
1776 flags2 |= (O_CREAT | O_TRUNC);
1777 clear_ads = true;
1778 break;
1779
1780 case FILE_OPEN:
1781 /* If file exists open. If file doesn't exist error. */
1782 if (!file_existed) {
1783 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1784 "requested for file %s and file "
1785 "doesn't exist.\n",
1786 smb_fname_str_dbg(smb_fname)));
1787 errno = ENOENT;
1788 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1789 }
1790 break;
1791
1792 case FILE_OVERWRITE:
1793 /* If file exists overwrite. If file doesn't exist
1794 * error. */
1795 if (!file_existed) {
1796 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1797 "requested for file %s and file "
1798 "doesn't exist.\n",
1799 smb_fname_str_dbg(smb_fname) ));
1800 errno = ENOENT;
1801 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1802 }
1803 flags2 |= O_TRUNC;
1804 clear_ads = true;
1805 break;
1806
1807 case FILE_CREATE:
1808 /* If file exists error. If file doesn't exist
1809 * create. */
1810 if (file_existed) {
1811 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1812 "requested for file %s and file "
1813 "already exists.\n",
1814 smb_fname_str_dbg(smb_fname)));
1815 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1816 errno = EISDIR;
1817 } else {
1818 errno = EEXIST;
1819 }
1820 return map_nt_error_from_unix(errno);
1821 }
1822 flags2 |= (O_CREAT|O_EXCL);
1823 break;
1824
1825 case FILE_OPEN_IF:
1826 /* If file exists open. If file doesn't exist
1827 * create. */
1828 flags2 |= O_CREAT;
1829 break;
1830
1831 default:
1832 return NT_STATUS_INVALID_PARAMETER;
1833 }
1834
1835 /* We only care about matching attributes on file exists and
1836 * overwrite. */
1837
1838 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1839 (create_disposition == FILE_OVERWRITE_IF))) {
1840 if (!open_match_attributes(conn, existing_dos_attributes,
1841 new_dos_attributes,
1842 smb_fname->st.st_ex_mode,
1843 unx_mode, &new_unx_mode)) {
1844 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1845 "for file %s (%x %x) (0%o, 0%o)\n",
1846 smb_fname_str_dbg(smb_fname),
1847 existing_dos_attributes,
1848 new_dos_attributes,
1849 (unsigned int)smb_fname->st.st_ex_mode,
1850 (unsigned int)unx_mode ));
1851 errno = EACCES;
1852 return NT_STATUS_ACCESS_DENIED;
1853 }
1854 }
1855
1856 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1857 access_mask,
1858 &access_mask);
1859 if (!NT_STATUS_IS_OK(status)) {
1860 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1861 "on file %s returned %s\n",
1862 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1863 return status;
1864 }
1865
1866 open_access_mask = access_mask;
1867
1868 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1869 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1870 }
1871
1872 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1873 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1874 access_mask));
1875
1876 /*
1877 * Note that we ignore the append flag as append does not
1878 * mean the same thing under DOS and Unix.
1879 */
1880
1881 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1882 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1883 /* DENY_DOS opens are always underlying read-write on the
1884 file handle, no matter what the requested access mask
1885 says. */
1886 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1887 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1888 flags = O_RDWR;
1889 } else {
1890 flags = O_WRONLY;
1891 }
1892 } else {
1893 flags = O_RDONLY;
1894 }
1895
1896 /*
1897 * Currently we only look at FILE_WRITE_THROUGH for create options.
1898 */
1899
1900 #if defined(O_SYNC)
1901 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1902 flags2 |= O_SYNC;
1903 }
1904 #endif /* O_SYNC */
1905
1906 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1907 flags2 |= O_APPEND;
1908 }
1909
1910 if (!posix_open && !CAN_WRITE(conn)) {
1911 /*
1912 * We should really return a permission denied error if either
1913 * O_CREAT or O_TRUNC are set, but for compatibility with
1914 * older versions of Samba we just AND them out.
1915 */
1916 flags2 &= ~(O_CREAT|O_TRUNC);
1917 }
1918
1919 /*
1920 * Ensure we can't write on a read-only share or file.
1921 */
1922
1923 if (flags != O_RDONLY && file_existed &&
1924 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1925 DEBUG(5,("open_file_ntcreate: write access requested for "
1926 "file %s on read only %s\n",
1927 smb_fname_str_dbg(smb_fname),
1928 !CAN_WRITE(conn) ? "share" : "file" ));
1929 errno = EACCES;
1930 return NT_STATUS_ACCESS_DENIED;
1931 }
1932
1933 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1934 fsp->share_access = share_access;
1935 fsp->fh->private_options = private_flags;
1936 fsp->access_mask = open_access_mask; /* We change this to the
1937 * requested access_mask after
1938 * the open is done. */
1939 fsp->posix_open = posix_open;
1940
1941 /* Ensure no SAMBA_PRIVATE bits can be set. */
1942 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1943
1944 if (timeval_is_zero(&request_time)) {
1945 request_time = fsp->open_time;
1946 }
1947
1948 if (file_existed) {
1949 struct byte_range_lock *br_lck = NULL;
1950 struct share_mode_entry *batch_entry = NULL;
1951 struct share_mode_entry *exclusive_entry = NULL;
1952 bool got_level2_oplock = false;
1953 bool got_a_none_oplock = false;
1954
1955 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1956 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1957
1958 if (!acquire_ordered_locks(talloc_tos(),
1959 fsp,
1960 id,
1961 conn->connectpath,
1962 smb_fname,
1963 &old_write_time,
1964 &lck,
1965 &br_lck)) {
1966 return NT_STATUS_SHARING_VIOLATION;
1967 }
1968
1969 /* Get the types we need to examine. */
1970 find_oplock_types(fsp,
1971 oplock_request,
1972 lck,
1973 &batch_entry,
1974 &exclusive_entry,
1975 &got_level2_oplock,
1976 &got_a_none_oplock);
1977
1978 /* First pass - send break only on batch oplocks. */
1979 if ((req != NULL) &&
1980 delay_for_batch_oplocks(fsp,
1981 req->mid,
1982 oplock_request,
1983 batch_entry)) {
1984 schedule_defer_open(lck, request_time, req);
1985 TALLOC_FREE(lck);
1986 return NT_STATUS_SHARING_VIOLATION;
1987 }
1988
1989 /* Use the client requested access mask here, not the one we
1990 * open with. */
1991 status = open_mode_check(conn, lck, fsp->name_hash,
1992 access_mask, share_access,
1993 create_options, &file_existed);
1994
1995 if (NT_STATUS_IS_OK(status)) {
1996 /* We might be going to allow this open. Check oplock
1997 * status again. */
1998 /* Second pass - send break for both batch or
1999 * exclusive oplocks. */
2000 if ((req != NULL) &&
2001 delay_for_exclusive_oplocks(
2002 fsp,
2003 req->mid,
2004 oplock_request,
2005 exclusive_entry)) {
2006 schedule_defer_open(lck, request_time, req);
2007 TALLOC_FREE(lck);
2008 return NT_STATUS_SHARING_VIOLATION;
2009 }
2010 }
2011
2012 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2013 /* DELETE_PENDING is not deferred for a second */
2014 TALLOC_FREE(lck);
2015 return status;
2016 }
2017
2018 grant_fsp_oplock_type(fsp,
2019 br_lck,
2020 oplock_request,
2021 got_level2_oplock,
2022 got_a_none_oplock);
2023
2024 if (!NT_STATUS_IS_OK(status)) {
2025 uint32 can_access_mask;
2026 bool can_access = True;
2027
2028 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2029
2030 /* Check if this can be done with the deny_dos and fcb
2031 * calls. */
2032 if (private_flags &
2033 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2034 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2035 if (req == NULL) {
2036 DEBUG(0, ("DOS open without an SMB "
2037 "request!\n"));
2038 TALLOC_FREE(lck);
2039 return NT_STATUS_INTERNAL_ERROR;
2040 }
2041
2042 /* Use the client requested access mask here,
2043 * not the one we open with. */
2044 status = fcb_or_dos_open(req,
2045 conn,
2046 fsp,
2047 smb_fname,
2048 id,
2049 req->smbpid,
2050 req->vuid,
2051 access_mask,
2052 share_access,
2053 create_options);
2054
2055 if (NT_STATUS_IS_OK(status)) {
2056 TALLOC_FREE(lck);
2057 if (pinfo) {
2058 *pinfo = FILE_WAS_OPENED;
2059 }
2060 return NT_STATUS_OK;
2061 }
2062 }
2063
2064 /*
2065 * This next line is a subtlety we need for
2066 * MS-Access. If a file open will fail due to share
2067 * permissions and also for security (access) reasons,
2068 * we need to return the access failed error, not the
2069 * share error. We can't open the file due to kernel
2070 * oplock deadlock (it's possible we failed above on
2071 * the open_mode_check()) so use a userspace check.
2072 */
2073
2074 if (flags & O_RDWR) {
2075 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2076 } else if (flags & O_WRONLY) {
2077 can_access_mask = FILE_WRITE_DATA;
2078 } else {
2079 can_access_mask = FILE_READ_DATA;
2080 }
2081
2082 if (((can_access_mask & FILE_WRITE_DATA) &&
2083 !CAN_WRITE(conn)) ||
2084 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2085 smb_fname, can_access_mask))) {
2086 can_access = False;
2087 }
2088
2089 /*
2090 * If we're returning a share violation, ensure we
2091 * cope with the braindead 1 second delay.
2092 */
2093
2094 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2095 lp_defer_sharing_violations()) {
2096 struct timeval timeout;
2097 struct deferred_open_record state;
2098 int timeout_usecs;
2099
2100 /* this is a hack to speed up torture tests
2101 in 'make test' */
2102 timeout_usecs = lp_parm_int(SNUM(conn),
2103 "smbd","sharedelay",
2104 SHARING_VIOLATION_USEC_WAIT);
2105
2106 /* This is a relative time, added to the absolute
2107 request_time value to get the absolute timeout time.
2108 Note that if this is the second or greater time we enter
2109 this codepath for this particular request mid then
2110 request_time is left as the absolute time of the *first*
2111 time this request mid was processed. This is what allows
2112 the request to eventually time out. */
2113
2114 timeout = timeval_set(0, timeout_usecs);
2115
2116 /* Nothing actually uses state.delayed_for_oplocks
2117 but it's handy to differentiate in debug messages
2118 between a 30 second delay due to oplock break, and
2119 a 1 second delay for share mode conflicts. */
2120
2121 state.delayed_for_oplocks = False;
2122 state.id = id;
2123
2124 if ((req != NULL)
2125 && !request_timed_out(request_time,
2126 timeout)) {
2127 defer_open(lck, request_time, timeout,
2128 req, &state);
2129 }
2130 }
2131
2132 TALLOC_FREE(lck);
2133 if (can_access) {
2134 /*
2135 * We have detected a sharing violation here
2136 * so return the correct error code
2137 */
2138 status = NT_STATUS_SHARING_VIOLATION;
2139 } else {
2140 status = NT_STATUS_ACCESS_DENIED;
2141 }
2142 return status;
2143 }
2144
2145 /*
2146 * We exit this block with the share entry *locked*.....
2147 */
2148 }
2149
2150 SMB_ASSERT(!file_existed || (lck != NULL));
2151
2152 /*
2153 * Ensure we pay attention to default ACLs on directories if required.
2154 */
2155
2156 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2157 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2158 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2159 }
2160
2161 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2162 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2163 (unsigned int)flags, (unsigned int)flags2,
2164 (unsigned int)unx_mode, (unsigned int)access_mask,
2165 (unsigned int)open_access_mask));
2166
2167 /*
2168 * open_file strips any O_TRUNC flags itself.
2169 */
2170
2171 fsp_open = open_file(fsp, conn, req, parent_dir,
2172 flags|flags2, unx_mode, access_mask,
2173 open_access_mask);
2174
2175 if (!NT_STATUS_IS_OK(fsp_open)) {
2176 TALLOC_FREE(lck);
2177 return fsp_open;
2178 }
2179
2180 if (!file_existed) {
2181 struct byte_range_lock *br_lck = NULL;
2182 struct share_mode_entry *batch_entry = NULL;
2183 struct share_mode_entry *exclusive_entry = NULL;
2184 bool got_level2_oplock = false;
2185 bool got_a_none_oplock = false;
2186 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2187 /*
2188 * Deal with the race condition where two smbd's detect the
2189 * file doesn't exist and do the create at the same time. One
2190 * of them will win and set a share mode, the other (ie. this
2191 * one) should check if the requested share mode for this
2192 * create is allowed.
2193 */
2194
2195 /*
2196 * Now the file exists and fsp is successfully opened,
2197 * fsp->dev and fsp->inode are valid and should replace the
2198 * dev=0,inode=0 from a non existent file. Spotted by
2199 * Nadav Danieli <nadavd@exanet.com>. JRA.
2200 */
2201
2202 id = fsp->file_id;
2203
2204 if (!acquire_ordered_locks(talloc_tos(),
2205 fsp,
2206 id,
2207 conn->connectpath,
2208 smb_fname,
2209 &old_write_time,
2210 &lck,
2211 &br_lck)) {
2212 return NT_STATUS_SHARING_VIOLATION;
2213 }
2214
2215 /* Get the types we need to examine. */
2216 find_oplock_types(fsp,
2217 oplock_request,
2218 lck,
2219 &batch_entry,
2220 &exclusive_entry,
2221 &got_level2_oplock,
2222 &got_a_none_oplock);
2223
2224 /* First pass - send break only on batch oplocks. */
2225 if ((req != NULL) &&
2226 delay_for_batch_oplocks(fsp,
2227 req->mid,
2228 oplock_request,
2229 batch_entry)) {
2230 schedule_defer_open(lck, request_time, req);
2231 TALLOC_FREE(lck);
2232 fd_close(fsp);
2233 return NT_STATUS_SHARING_VIOLATION;
2234 }
2235
2236 status = open_mode_check(conn, lck, fsp->name_hash,
2237 access_mask, share_access,
2238 create_options, &file_existed);
2239
2240 if (NT_STATUS_IS_OK(status)) {
2241 /* We might be going to allow this open. Check oplock
2242 * status again. */
2243 /* Second pass - send break for both batch or
2244 * exclusive oplocks. */
2245 if ((req != NULL) &&
2246 delay_for_exclusive_oplocks(
2247 fsp,
2248 req->mid,
2249 oplock_request,
2250 exclusive_entry)) {
2251 schedule_defer_open(lck, request_time, req);
2252 TALLOC_FREE(lck);
2253 fd_close(fsp);
2254 return NT_STATUS_SHARING_VIOLATION;
2255 }
2256 }
2257
2258 if (!NT_STATUS_IS_OK(status)) {
2259 struct deferred_open_record state;
2260
2261 state.delayed_for_oplocks = False;
2262 state.id = id;
2263
2264 /* Do it all over again immediately. In the second
2265 * round we will find that the file existed and handle
2266 * the DELETE_PENDING and FCB cases correctly. No need
2267 * to duplicate the code here. Essentially this is a
2268 * "goto top of this function", but don't tell
2269 * anybody... */
2270
2271 if (req != NULL) {
2272 defer_open(lck, request_time, timeval_zero(),
2273 req, &state);
2274 }
2275 TALLOC_FREE(lck);
2276 fd_close(fsp);
2277 return status;
2278 }
2279
2280 grant_fsp_oplock_type(fsp,
2281 br_lck,
2282 oplock_request,
2283 got_level2_oplock,
2284 got_a_none_oplock);
2285
2286 /*
2287 * We exit this block with the share entry *locked*.....
2288 */
2289
2290 }
2291
2292 SMB_ASSERT(lck != NULL);
2293
2294 /* Delete streams if create_disposition requires it */
2295 if (file_existed && clear_ads &&
2296 !is_ntfs_stream_smb_fname(smb_fname)) {
2297 status = delete_all_streams(conn, smb_fname->base_name);
2298 if (!NT_STATUS_IS_OK(status)) {
2299 TALLOC_FREE(lck);
2300 fd_close(fsp);
2301 return status;
2302 }
2303 }
2304
2305 /* note that we ignore failure for the following. It is
2306 basically a hack for NFS, and NFS will never set one of
2307 these only read them. Nobody but Samba can ever set a deny
2308 mode and we have already checked our more authoritative
2309 locking database for permission to set this deny mode. If
2310 the kernel refuses the operations then the kernel is wrong.
2311 note that GPFS supports it as well - jmcd */
2312
2313 if (fsp->fh->fd != -1) {
2314 int ret_flock;
2315 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2316 if(ret_flock == -1 ){
2317
2318 TALLOC_FREE(lck);
2319 fd_close(fsp);
2320
2321 return NT_STATUS_SHARING_VIOLATION;
2322 }
2323 }
2324
2325 /*
2326 * At this point onwards, we can guarentee that the share entry
2327 * is locked, whether we created the file or not, and that the
2328 * deny mode is compatible with all current opens.
2329 */
2330
2331 /*
2332 * If requested, truncate the file.
2333 */
2334
2335 if (file_existed && (flags2&O_TRUNC)) {
2336 /*
2337 * We are modifing the file after open - update the stat
2338 * struct..
2339 */
2340 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2341 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2342 status = map_nt_error_from_unix(errno);
2343 TALLOC_FREE(lck);
2344 fd_close(fsp);
2345 return status;
2346 }
2347 }
2348
2349 /*
2350 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2351 * but we don't have to store this - just ignore it on access check.
2352 */
2353 if (conn->sconn->using_smb2) {
2354 /*
2355 * SMB2 doesn't return it (according to Microsoft tests).
2356 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2357 * File created with access = 0x7 (Read, Write, Delete)
2358 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2359 */
2360 fsp->access_mask = access_mask;
2361 } else {
2362 /* But SMB1 does. */
2363 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2364 }
2365
2366 if (file_existed) {
2367 /* stat opens on existing files don't get oplocks. */
2368 if (is_stat_open(open_access_mask)) {
2369 fsp->oplock_type = NO_OPLOCK;
2370 }
2371
2372 if (!(flags2 & O_TRUNC)) {
2373 info = FILE_WAS_OPENED;
2374 } else {
2375 info = FILE_WAS_OVERWRITTEN;
2376 }
2377 } else {
2378 info = FILE_WAS_CREATED;
2379 }
2380
2381 if (pinfo) {
2382 *pinfo = info;
2383 }
2384
2385 /*
2386 * Setup the oplock info in both the shared memory and
2387 * file structs.
2388 */
2389
2390 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2391 /*
2392 * Could not get the kernel oplock or there are byte-range
2393 * locks on the file.
2394 */
2395 fsp->oplock_type = NO_OPLOCK;
2396 }
2397
2398 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2399 new_file_created = True;
2400 }
2401
2402 set_share_mode(lck, fsp, get_current_uid(conn),
2403 req ? req->mid : 0,
2404 fsp->oplock_type);
2405
2406 /* Handle strange delete on close create semantics. */
2407 if (create_options & FILE_DELETE_ON_CLOSE) {
2408
2409 status = can_set_delete_on_close(fsp, new_dos_attributes);
2410
2411 if (!NT_STATUS_IS_OK(status)) {
2412 /* Remember to delete the mode we just added. */
2413 del_share_mode(lck, fsp);
2414 TALLOC_FREE(lck);
2415 fd_close(fsp);
2416 return status;
2417 }
2418 /* Note that here we set the *inital* delete on close flag,
2419 not the regular one. The magic gets handled in close. */
2420 fsp->initial_delete_on_close = True;
2421 }
2422
2423 if (new_file_created) {
2424 /* Files should be initially set as archive */
2425 if (lp_map_archive(SNUM(conn)) ||
2426 lp_store_dos_attributes(SNUM(conn))) {
2427 if (!posix_open) {
2428 if (file_set_dosmode(conn, smb_fname,
2429 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2430 parent_dir, true) == 0) {
2431 unx_mode = smb_fname->st.st_ex_mode;
2432 }
2433 }
2434 }
2435 }
2436
2437 /* Determine sparse flag. */
2438 if (posix_open) {
2439 /* POSIX opens are sparse by default. */
2440 fsp->is_sparse = true;
2441 } else {
2442 fsp->is_sparse = (file_existed &&
2443 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2444 }
2445
2446 /*
2447 * Take care of inherited ACLs on created files - if default ACL not
2448 * selected.
2449 */
2450
2451 if (!posix_open && !file_existed && !def_acl) {
2452
2453 int saved_errno = errno; /* We might get ENOSYS in the next
2454 * call.. */
2455
2456 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2457 errno == ENOSYS) {
2458 errno = saved_errno; /* Ignore ENOSYS */
2459 }
2460
2461 } else if (new_unx_mode) {
2462
2463 int ret = -1;
2464
2465 /* Attributes need changing. File already existed. */
2466
2467 {
2468 int saved_errno = errno; /* We might get ENOSYS in the
2469 * next call.. */
2470 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2471
2472 if (ret == -1 && errno == ENOSYS) {
2473 errno = saved_errno; /* Ignore ENOSYS */
2474 } else {
2475 DEBUG(5, ("open_file_ntcreate: reset "
2476 "attributes of file %s to 0%o\n",
2477 smb_fname_str_dbg(smb_fname),
2478 (unsigned int)new_unx_mode));
2479 ret = 0; /* Don't do the fchmod below. */
2480 }
2481 }
2482
2483 if ((ret == -1) &&
2484 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2485 DEBUG(5, ("open_file_ntcreate: failed to reset "
2486 "attributes of file %s to 0%o\n",
2487 smb_fname_str_dbg(smb_fname),
2488 (unsigned int)new_unx_mode));
2489 }
2490
2491 /* If this is a successful open, we must remove any deferred open
2492 * records. */
2493 if (req != NULL) {
2494 del_deferred_open_entry(lck, req->mid,
2495 sconn_server_id(req->sconn));
2496 }
2497 TALLOC_FREE(lck);
2498
2499 return NT_STATUS_OK;
2500 }
2501
2502
2503 /****************************************************************************
2504 Open a file for for write to ensure that we can fchmod it.
2505 ****************************************************************************/
2506
2507 NTSTATUS open_file_fchmod(connection_struct *conn,
2508 struct smb_filename *smb_fname,
2509 files_struct **result)
2510 {
2511 if (!VALID_STAT(smb_fname->st)) {
2512 return NT_STATUS_INVALID_PARAMETER;
2513 }
2514
2515 return SMB_VFS_CREATE_FILE(
2516 conn, /* conn */
2517 NULL, /* req */
2518 0, /* root_dir_fid */
2519 smb_fname, /* fname */
2520 FILE_WRITE_DATA, /* access_mask */
2521 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2522 FILE_SHARE_DELETE),
2523 FILE_OPEN, /* create_disposition*/
2524 0, /* create_options */
2525 0, /* file_attributes */
2526 INTERNAL_OPEN_ONLY, /* oplock_request */
2527 0, /* allocation_size */
2528 0, /* private_flags */
2529 NULL, /* sd */
2530 NULL, /* ea_list */
2531 result, /* result */
2532 NULL); /* pinfo */
2533 }
2534
2535 static NTSTATUS mkdir_internal(connection_struct *conn,
2536 struct smb_filename *smb_dname,
2537 uint32 file_attributes)
2538 {
2539 mode_t mode;
2540 char *parent_dir = NULL;
2541 NTSTATUS status;
2542 bool posix_open = false;
2543 bool need_re_stat = false;
2544 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2545
2546 if(access_mask & ~(conn->share_access)) {
2547 DEBUG(5,("mkdir_internal: failing share access "
2548 "%s\n", lp_servicename(SNUM(conn))));
2549 return NT_STATUS_ACCESS_DENIED;
2550 }
2551
2552 status = check_name(conn, smb_dname->base_name);
2553 if (!NT_STATUS_IS_OK(status)) {
2554 return status;
2555 }
2556
2557 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2558 NULL)) {
2559 return NT_STATUS_NO_MEMORY;
2560 }
2561
2562 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2563 posix_open = true;
2564 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2565 } else {
2566 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2567 }
2568
2569 status = check_parent_access(conn,
2570 smb_dname,
2571 access_mask,
2572 &parent_dir);
2573 if(!NT_STATUS_IS_OK(status)) {
2574 DEBUG(5,("mkdir_internal: check_parent_access "
2575 "on directory %s for path %s returned %s\n",
2576 parent_dir,
2577 smb_dname->base_name,
2578 nt_errstr(status) ));
2579 return status;
2580 }
2581
2582 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2583 return map_nt_error_from_unix(errno);
2584 }
2585
2586 /* Ensure we're checking for a symlink here.... */
2587 /* We don't want to get caught by a symlink racer. */
2588
2589 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2590 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2591 smb_fname_str_dbg(smb_dname), strerror(errno)));
2592 return map_nt_error_from_unix(errno);
2593 }
2594
2595 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2596 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2597 smb_fname_str_dbg(smb_dname)));
2598 return NT_STATUS_NOT_A_DIRECTORY;
2599 }
2600
2601 if (lp_store_dos_attributes(SNUM(conn))) {
2602 if (!posix_open) {
2603 file_set_dosmode(conn, smb_dname,
2604 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2605 parent_dir, true);
2606 }
2607 }
2608
2609 if (lp_inherit_perms(SNUM(conn))) {
2610 inherit_access_posix_acl(conn, parent_dir,
2611 smb_dname->base_name, mode);
2612 need_re_stat = true;
2613 }
2614
2615 if (!posix_open) {
2616 /*
2617 * Check if high bits should have been set,
2618 * then (if bits are missing): add them.
2619 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2620 * dir.
2621 */
2622 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2623 (mode & ~smb_dname->st.st_ex_mode)) {
2624 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2625 (smb_dname->st.st_ex_mode |
2626 (mode & ~smb_dname->st.st_ex_mode)));
2627 need_re_stat = true;
2628 }
2629 }
2630
2631 /* Change the owner if required. */
2632 if (lp_inherit_owner(SNUM(conn))) {
2633 change_dir_owner_to_parent(conn, parent_dir,
2634 smb_dname->base_name,
2635 &smb_dname->st);
2636 need_re_stat = true;
2637 }
2638
2639 if (need_re_stat) {
2640 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2641 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2642 smb_fname_str_dbg(smb_dname), strerror(errno)));
2643 return map_nt_error_from_unix(errno);
2644 }
2645 }
2646
2647 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2648 smb_dname->base_name);
2649
2650 return NT_STATUS_OK;
2651 }
2652
2653 /****************************************************************************
2654 Ensure we didn't get symlink raced on opening a directory.
2655 ****************************************************************************/
2656
2657 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2658 const SMB_STRUCT_STAT *sbuf2)
2659 {
2660 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2661 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2662 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2663 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2664 return false;
2665 }
2666 return true;
2667 }
2668
2669 /****************************************************************************
2670 Open a directory from an NT SMB call.
2671 ****************************************************************************/
2672
2673 static NTSTATUS open_directory(connection_struct *conn,
2674 struct smb_request *req,
2675 struct smb_filename *smb_dname,
2676 uint32 access_mask,
2677 uint32 share_access,
2678 uint32 create_disposition,
2679 uint32 create_options,
2680 uint32 file_attributes,
2681 int *pinfo,
2682 files_struct **result)
2683 {
2684 files_struct *fsp = NULL;
2685 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2686 struct share_mode_lock *lck = NULL;
2687 NTSTATUS status;
2688 struct timespec mtimespec;
2689 int info = 0;
2690
2691 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2692
2693 /* Ensure we have a directory attribute. */
2694 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2695
2696 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2697 "share_access = 0x%x create_options = 0x%x, "
2698 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2699 smb_fname_str_dbg(smb_dname),
2700 (unsigned int)access_mask,
2701 (unsigned int)share_access,
2702 (unsigned int)create_options,
2703 (unsigned int)create_disposition,
2704 (unsigned int)file_attributes));
2705
2706 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2707 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2708 is_ntfs_stream_smb_fname(smb_dname)) {
2709 DEBUG(2, ("open_directory: %s is a stream name!\n",
2710 smb_fname_str_dbg(smb_dname)));
2711 return NT_STATUS_NOT_A_DIRECTORY;
2712 }
2713
2714 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2715 access_mask, &access_mask);
2716 if (!NT_STATUS_IS_OK(status)) {
2717 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2718 "on file %s returned %s\n",
2719 smb_fname_str_dbg(smb_dname),
2720 nt_errstr(status)));
2721 return status;
2722 }
2723
2724 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2725 !security_token_has_privilege(get_current_nttok(conn),
2726 SEC_PRIV_SECURITY)) {
2727 DEBUG(10, ("open_directory: open on %s "
2728 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2729 smb_fname_str_dbg(smb_dname)));
2730 return NT_STATUS_PRIVILEGE_NOT_HELD;
2731 }
2732
2733 switch( create_disposition ) {
2734 case FILE_OPEN:
2735
2736 if (!dir_existed) {
2737 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2738 }
2739
2740 info = FILE_WAS_OPENED;
2741 break;
2742
2743 case FILE_CREATE:
2744
2745 /* If directory exists error. If directory doesn't
2746 * exist create. */
2747
2748 if (dir_existed) {
2749 status = NT_STATUS_OBJECT_NAME_COLLISION;
2750 DEBUG(2, ("open_directory: unable to create "
2751 "%s. Error was %s\n",
2752 smb_fname_str_dbg(smb_dname),
2753 nt_errstr(status)));
2754 return status;
2755 }
2756
2757 status = mkdir_internal(conn, smb_dname,
2758 file_attributes);
2759
2760 if (!NT_STATUS_IS_OK(status)) {
2761 DEBUG(2, ("open_directory: unable to create "
2762 "%s. Error was %s\n",
2763 smb_fname_str_dbg(smb_dname),
2764 nt_errstr(status)));
2765 return status;
2766 }
2767
2768 info = FILE_WAS_CREATED;
2769 break;
2770
2771 case FILE_OPEN_IF:
2772 /*
2773 * If directory exists open. If directory doesn't
2774 * exist create.
2775 */
2776
2777 if (dir_existed) {
2778 status = NT_STATUS_OK;
2779 info = FILE_WAS_OPENED;
2780 } else {
2781 status = mkdir_internal(conn, smb_dname,
2782 file_attributes);
2783
2784 if (NT_STATUS_IS_OK(status)) {
2785 info = FILE_WAS_CREATED;
2786 } else {
2787 /* Cope with create race. */
2788 if (!NT_STATUS_EQUAL(status,
2789 NT_STATUS_OBJECT_NAME_COLLISION)) {
2790 DEBUG(2, ("open_directory: unable to create "
2791 "%s. Error was %s\n",
2792 smb_fname_str_dbg(smb_dname),
2793 nt_errstr(status)));
2794 return status;
2795 }
2796 info = FILE_WAS_OPENED;
2797 }
2798 }
2799
2800 break;
2801
2802 case FILE_SUPERSEDE:
2803 case FILE_OVERWRITE:
2804 case FILE_OVERWRITE_IF:
2805 default:
2806 DEBUG(5,("open_directory: invalid create_disposition "
2807 "0x%x for directory %s\n",
2808 (unsigned int)create_disposition,
2809 smb_fname_str_dbg(smb_dname)));
2810 return NT_STATUS_INVALID_PARAMETER;
2811 }
2812
2813 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2814 DEBUG(5,("open_directory: %s is not a directory !\n",
2815 smb_fname_str_dbg(smb_dname)));
2816 return NT_STATUS_NOT_A_DIRECTORY;
2817 }
2818
2819 if (info == FILE_WAS_OPENED) {
2820 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2821 if (!NT_STATUS_IS_OK(status)) {
2822 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2823 "file %s failed with %s\n",
2824 smb_fname_str_dbg(smb_dname),
2825 nt_errstr(status)));
2826 return status;
2827 }
2828 }
2829
2830 status = file_new(req, conn, &fsp);
2831 if(!NT_STATUS_IS_OK(status)) {
2832 return status;
2833 }
2834
2835 /*
2836 * Setup the files_struct for it.
2837 */
2838
2839 fsp->mode = smb_dname->st.st_ex_mode;
2840 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2841 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2842 fsp->file_pid = req ? req->smbpid : 0;
2843 fsp->can_lock = False;
2844 fsp->can_read = False;
2845 fsp->can_write = False;
2846
2847 fsp->share_access = share_access;
2848 fsp->fh->private_options = 0;
2849 /*
2850 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2851 */
2852 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2853 fsp->print_file = NULL;
2854 fsp->modified = False;
2855 fsp->oplock_type = NO_OPLOCK;
2856 fsp->sent_oplock_break = NO_BREAK_SENT;
2857 fsp->is_directory = True;
2858 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2859 status = fsp_set_smb_fname(fsp, smb_dname);
2860 if (!NT_STATUS_IS_OK(status)) {
2861 file_free(req, fsp);
2862 return status;
2863 }
2864
2865 mtimespec = smb_dname->st.st_ex_mtime;
2866
2867 #ifdef O_DIRECTORY
2868 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2869 #else
2870 /* POSIX allows us to open a directory with O_RDONLY. */
2871 status = fd_open(conn, fsp, O_RDONLY, 0);
2872 #endif
2873 if (!NT_STATUS_IS_OK(status)) {
2874 DEBUG(5, ("open_directory: Could not open fd for "
2875 "%s (%s)\n",
2876 smb_fname_str_dbg(smb_dname),
2877 nt_errstr(status)));
2878 file_free(req, fsp);
2879 return status;
2880 }
2881
2882 status = vfs_stat_fsp(fsp);
2883 if (!NT_STATUS_IS_OK(status)) {
2884 fd_close(fsp);
2885 file_free(req, fsp);
2886 return status;
2887 }
2888
2889 /* Ensure there was no race condition. */
2890 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2891 DEBUG(5,("open_directory: stat struct differs for "
2892 "directory %s.\n",
2893 smb_fname_str_dbg(smb_dname)));
2894 fd_close(fsp);
2895 file_free(req, fsp);
2896 return NT_STATUS_ACCESS_DENIED;
2897 }
2898
2899 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2900 conn->connectpath, smb_dname, &mtimespec);
2901
2902 if (lck == NULL) {
2903 DEBUG(0, ("open_directory: Could not get share mode lock for "
2904 "%s\n", smb_fname_str_dbg(smb_dname)));
2905 fd_close(fsp);
2906 file_free(req, fsp);
2907 return NT_STATUS_SHARING_VIOLATION;
2908 }
2909
2910 status = open_mode_check(conn, lck, fsp->name_hash,
2911 access_mask, share_access,
2912 create_options, &dir_existed);
2913
2914 if (!NT_STATUS_IS_OK(status)) {
2915 TALLOC_FREE(lck);
2916 fd_close(fsp);
2917 file_free(req, fsp);
2918 return status;
2919 }
2920
2921 set_share_mode(lck, fsp, get_current_uid(conn),
2922 req ? req->mid : 0, NO_OPLOCK);
2923
2924 /* For directories the delete on close bit at open time seems
2925 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2926 if (create_options & FILE_DELETE_ON_CLOSE) {
2927 status = can_set_delete_on_close(fsp, 0);
2928 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2929 TALLOC_FREE(lck);
2930 fd_close(fsp);
2931 file_free(req, fsp);
2932 return status;
2933 }
2934
2935 if (NT_STATUS_IS_OK(status)) {
2936 /* Note that here we set the *inital* delete on close flag,
2937 not the regular one. The magic gets handled in close. */
2938 fsp->initial_delete_on_close = True;
2939 }
2940 }
2941
2942 TALLOC_FREE(lck);
2943
2944 if (pinfo) {
2945 *pinfo = info;
2946 }
2947
2948 *result = fsp;
2949 return NT_STATUS_OK;
2950 }
2951
2952 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2953 struct smb_filename *smb_dname)
2954 {
2955 NTSTATUS status;
2956 files_struct *fsp;
2957
2958 status = SMB_VFS_CREATE_FILE(
2959 conn, /* conn */
2960 req, /* req */
2961 0, /* root_dir_fid */
2962 smb_dname, /* fname */
2963 FILE_READ_ATTRIBUTES, /* access_mask */
2964 FILE_SHARE_NONE, /* share_access */
2965 FILE_CREATE, /* create_disposition*/
2966 FILE_DIRECTORY_FILE, /* create_options */
2967 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2968 0, /* oplock_request */
2969 0, /* allocation_size */
2970 0, /* private_flags */
2971 NULL, /* sd */
2972 NULL, /* ea_list */
2973 &fsp, /* result */
2974 NULL); /* pinfo */
2975
2976 if (NT_STATUS_IS_OK(status)) {
2977 close_file(req, fsp, NORMAL_CLOSE);
2978 }
2979
2980 return status;
2981 }
2982
2983 /****************************************************************************
2984 Receive notification that one of our open files has been renamed by another
2985 smbd process.
2986 ****************************************************************************/
2987
2988 void msg_file_was_renamed(struct messaging_context *msg,
2989 void *private_data,
2990 uint32_t msg_type,
2991 struct server_id server_id,
2992 DATA_BLOB *data)
2993 {
2994 struct smbd_server_connection *sconn;
2995 files_struct *fsp;
2996 char *frm = (char *)data->data;
2997 struct file_id id;
2998 const char *sharepath;
2999 const char *base_name;
3000 const char *stream_name;
3001 struct smb_filename *smb_fname = NULL;
3002 size_t sp_len, bn_len;
3003 NTSTATUS status;
3004
3005 sconn = msg_ctx_to_sconn(msg);
3006 if (sconn == NULL) {
3007 DEBUG(1, ("could not find sconn\n"));
3008 return;
3009 }
3010
3011 if (data->data == NULL
3012 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3013 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3014 (int)data->length));
3015 return;
3016 }
3017
3018 /* Unpack the message. */
3019 pull_file_id_24(frm, &id);
3020 sharepath = &frm[24];
3021 sp_len = strlen(sharepath);
3022 base_name = sharepath + sp_len + 1;
3023 bn_len = strlen(base_name);
3024 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3025
3026 /* stream_name must always be NULL if there is no stream. */
3027 if (stream_name[0] == '\0') {
3028 stream_name = NULL;
3029 }
3030
3031 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3032 stream_name, NULL, &smb_fname);
3033 if (!NT_STATUS_IS_OK(status)) {
3034 return;
3035 }
3036
3037 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3038 "file_id %s\n",
3039 sharepath, smb_fname_str_dbg(smb_fname),
3040 file_id_string_tos(&id)));
3041
3042 for(fsp = file_find_di_first(sconn, id); fsp;
3043 fsp = file_find_di_next(fsp)) {
3044 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3045
3046 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3047 fsp->fnum, fsp_str_dbg(fsp),
3048 smb_fname_str_dbg(smb_fname)));
3049 status = fsp_set_smb_fname(fsp, smb_fname);
3050 if (!NT_STATUS_IS_OK(status)) {
3051 goto out;
3052 }
3053 } else {
3054 /* TODO. JRA. */
3055 /* Now we have the complete path we can work out if this is
3056 actually within this share and adjust newname accordingly. */
3057 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3058 "not sharepath %s) "
3059 "fnum %d from %s -> %s\n",
3060 fsp->conn->connectpath,
3061 sharepath,
3062 fsp->fnum,
3063 fsp_str_dbg(fsp),
3064 smb_fname_str_dbg(smb_fname)));
3065 }
3066 }
3067 out:
3068 TALLOC_FREE(smb_fname);
3069 return;
3070 }
3071
3072 /*
3073 * If a main file is opened for delete, all streams need to be checked for
3074 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3075 * If that works, delete them all by setting the delete on close and close.
3076 */
3077
3078 NTSTATUS open_streams_for_delete(connection_struct *conn,
3079 const char *fname)
3080 {
3081 struct stream_struct *stream_info = NULL;
3082 files_struct **streams = NULL;
3083 int i;
3084 unsigned int num_streams = 0;
3085 TALLOC_CTX *frame = talloc_stackframe();
3086 NTSTATUS status;
3087
3088 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3089 &num_streams, &stream_info);
3090
3091 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3092 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3093 DEBUG(10, ("no streams around\n"));
3094 TALLOC_FREE(frame);
3095 return NT_STATUS_OK;
3096 }
3097
3098 if (!NT_STATUS_IS_OK(status)) {
3099 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3100 nt_errstr(status)));
3101 goto fail;
3102 }
3103
3104 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3105 num_streams));
3106
3107 if (num_streams == 0) {
3108 TALLOC_FREE(frame);
3109 return NT_STATUS_OK;
3110 }
3111
3112 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3113 if (streams == NULL) {
3114 DEBUG(0, ("talloc failed\n"));
3115 status = NT_STATUS_NO_MEMORY;
3116 goto fail;
3117 }
3118
3119 for (i=0; i<num_streams; i++) {
3120 struct smb_filename *smb_fname = NULL;
3121
3122 if (strequal(stream_info[i].name, "::$DATA")) {
3123 streams[i] = NULL;
3124 continue;
3125 }
3126
3127 status = create_synthetic_smb_fname(talloc_tos(), fname,
3128 stream_info[i].name,
3129 NULL, &smb_fname);
3130 if (!NT_STATUS_IS_OK(status)) {
3131 goto fail;
3132 }
3133
3134 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3135 DEBUG(10, ("Unable to stat stream: %s\n",
3136 smb_fname_str_dbg(smb_fname)));
3137 }
3138
3139 status = SMB_VFS_CREATE_FILE(
3140 conn, /* conn */
3141 NULL, /* req */
3142 0, /* root_dir_fid */
3143 smb_fname, /* fname */
3144 DELETE_ACCESS, /* access_mask */
3145 (FILE_SHARE_READ | /* share_access */
3146 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3147 FILE_OPEN, /* create_disposition*/
3148 0, /* create_options */
3149 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3150 0, /* oplock_request */
3151 0, /* allocation_size */
3152 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3153 NULL, /* sd */
3154 NULL, /* ea_list */
3155 &streams[i], /* result */
3156 NULL); /* pinfo */
3157
3158 if (!NT_STATUS_IS_OK(status)) {
3159 DEBUG(10, ("Could not open stream %s: %s\n",
3160 smb_fname_str_dbg(smb_fname),
3161 nt_errstr(status)));
3162
3163 TALLOC_FREE(smb_fname);
3164 break;
3165 }
3166 TALLOC_FREE(smb_fname);
3167 }
3168
3169 /*
3170 * don't touch the variable "status" beyond this point :-)
3171 */
3172
3173 for (i -= 1 ; i >= 0; i--) {
3174 if (streams[i] == NULL) {
3175 continue;
3176 }
3177
3178 DEBUG(10, ("Closing stream # %d, %s\n", i,
3179 fsp_str_dbg(streams[i])));
3180 close_file(NULL, streams[i], NORMAL_CLOSE);
3181 }
3182
3183 fail:
3184 TALLOC_FREE(frame);
3185 return status;
3186 }
3187
3188 /*
3189 * Wrapper around open_file_ntcreate and open_directory
3190 */
3191
3192 static NTSTATUS create_file_unixpath(connection_struct *conn,
3193 struct smb_request *req,
3194 struct smb_filename *smb_fname,
3195 uint32_t access_mask,
3196 uint32_t share_access,
3197 uint32_t create_disposition,
3198 uint32_t create_options,
3199 uint32_t file_attributes,
3200 uint32_t oplock_request,
3201 uint64_t allocation_size,
3202 uint32_t private_flags,
3203 struct security_descriptor *sd,
3204 struct ea_list *ea_list,
3205
3206 files_struct **result,
3207 int *pinfo)
3208 {
3209 int info = FILE_WAS_OPENED;
3210 files_struct *base_fsp = NULL;
3211 files_struct *fsp = NULL;
3212 NTSTATUS status;
3213
3214 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3215 "file_attributes = 0x%x, share_access = 0x%x, "
3216 "create_disposition = 0x%x create_options = 0x%x "
3217 "oplock_request = 0x%x private_flags = 0x%x "
3218 "ea_list = 0x%p, sd = 0x%p, "
3219 "fname = %s\n",
3220 (unsigned int)access_mask,
3221 (unsigned int)file_attributes,
3222 (unsigned int)share_access,
3223 (unsigned int)create_disposition,
3224 (unsigned int)create_options,
3225 (unsigned int)oplock_request,
3226 (unsigned int)private_flags,
3227 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3228
3229 if (create_options & FILE_OPEN_BY_FILE_ID) {
3230 status = NT_STATUS_NOT_SUPPORTED;
3231 goto fail;
3232 }
3233
3234 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3235 status = NT_STATUS_INVALID_PARAMETER;
3236 goto fail;
3237 }
3238
3239 if (req == NULL) {
3240 oplock_request |= INTERNAL_OPEN_ONLY;
3241 }
3242
3243 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3244 && (access_mask & DELETE_ACCESS)
3245 && !is_ntfs_stream_smb_fname(smb_fname)) {
3246 /*
3247 * We can't open a file with DELETE access if any of the
3248 * streams is open without FILE_SHARE_DELETE
3249 */
3250 status = open_streams_for_delete(conn, smb_fname->base_name);
3251
3252 if (!NT_STATUS_IS_OK(status)) {
3253 goto fail;
3254 }
3255 }
3256
3257 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3258 !security_token_has_privilege(get_current_nttok(conn),
3259 SEC_PRIV_SECURITY)) {
3260 DEBUG(10, ("create_file_unixpath: open on %s "
3261 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3262 smb_fname_str_dbg(smb_fname)));
3263 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3264 goto fail;
3265 }
3266
3267 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3268 && is_ntfs_stream_smb_fname(smb_fname)
3269 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3270 uint32 base_create_disposition;
3271 struct smb_filename *smb_fname_base = NULL;
3272
3273 if (create_options & FILE_DIRECTORY_FILE) {
3274 status = NT_STATUS_NOT_A_DIRECTORY;
3275 goto fail;
3276 }
3277
3278 switch (create_disposition) {
3279 case FILE_OPEN:
3280 base_create_disposition = FILE_OPEN;
3281 break;
3282 default:
3283 base_create_disposition = FILE_OPEN_IF;
3284 break;
3285 }
3286
3287 /* Create an smb_filename with stream_name == NULL. */
3288 status = create_synthetic_smb_fname(talloc_tos(),
3289 smb_fname->base_name,
3290 NULL, NULL,
3291 &smb_fname_base);
3292 if (!NT_STATUS_IS_OK(status)) {
3293 goto fail;
3294 }
3295
3296 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3297 DEBUG(10, ("Unable to stat stream: %s\n",
3298 smb_fname_str_dbg(smb_fname_base)));
3299 }
3300
3301 /* Open the base file. */
3302 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3303 FILE_SHARE_READ
3304 | FILE_SHARE_WRITE
3305 | FILE_SHARE_DELETE,
3306 base_create_disposition,
3307 0, 0, 0, 0, 0, NULL, NULL,
3308 &base_fsp, NULL);
3309 TALLOC_FREE(smb_fname_base);
3310
3311 if (!NT_STATUS_IS_OK(status)) {
3312 DEBUG(10, ("create_file_unixpath for base %s failed: "
3313 "%s\n", smb_fname->base_name,
3314 nt_errstr(status)));
3315 goto fail;
3316 }
3317 /* we don't need to low level fd */
3318 fd_close(base_fsp);
3319 }
3320
3321 /*
3322 * If it's a request for a directory open, deal with it separately.
3323 */
3324
3325 if (create_options & FILE_DIRECTORY_FILE) {
3326
3327 if (create_options & FILE_NON_DIRECTORY_FILE) {
3328 status = NT_STATUS_INVALID_PARAMETER;
3329 goto fail;
3330 }
3331
3332 /* Can't open a temp directory. IFS kit test. */
3333 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3334 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3335 status = NT_STATUS_INVALID_PARAMETER;
3336 goto fail;
3337 }
3338
3339 /*
3340 * We will get a create directory here if the Win32
3341 * app specified a security descriptor in the
3342 * CreateDirectory() call.
3343 */
3344
3345 oplock_request = 0;
3346 status = open_directory(
3347 conn, req, smb_fname, access_mask, share_access,
3348 create_disposition, create_options, file_attributes,
3349 &info, &fsp);
3350 } else {
3351
3352 /*
3353 * Ordinary file case.
3354 */
3355
3356 status = file_new(req, conn, &fsp);
3357 if(!NT_STATUS_IS_OK(status)) {
3358 goto fail;
3359 }
3360
3361 status = fsp_set_smb_fname(fsp, smb_fname);
3362 if (!NT_STATUS_IS_OK(status)) {
3363 goto fail;
3364 }
3365
3366 /*
3367 * We're opening the stream element of a base_fsp
3368 * we already opened. Set up the base_fsp pointer.
3369 */
3370 if (base_fsp) {
3371 fsp->base_fsp = base_fsp;
3372 }
3373
3374 status = open_file_ntcreate(conn,
3375 req,
3376 access_mask,
3377 share_access,
3378 create_disposition,
3379 create_options,
3380 file_attributes,
3381 oplock_request,
3382 private_flags,
3383 &info,
3384 fsp);
3385
3386 if(!NT_STATUS_IS_OK(status)) {
3387 file_free(req, fsp);
3388 fsp = NULL;
3389 }
3390
3391 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3392
3393 /* A stream open never opens a directory */
3394
3395 if (base_fsp) {
3396 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3397 goto fail;
3398 }
3399
3400 /*
3401 * Fail the open if it was explicitly a non-directory
3402 * file.
3403 */
3404
3405 if (create_options & FILE_NON_DIRECTORY_FILE) {
3406 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3407 goto fail;
3408 }
3409
3410 oplock_request = 0;
3411 status = open_directory(
3412 conn, req, smb_fname, access_mask,
3413 share_access, create_disposition,
3414 create_options, file_attributes,
3415 &info, &fsp);
3416 }
3417 }
3418
3419 if (!NT_STATUS_IS_OK(status)) {
3420 goto fail;
3421 }
3422
3423 fsp->base_fsp = base_fsp;
3424
3425 /*
3426 * According to the MS documentation, the only time the security
3427 * descriptor is applied to the opened file is iff we *created* the
3428 * file; an existing file stays the same.
3429 *
3430 * Also, it seems (from observation) that you can open the file with
3431 * any access mask but you can still write the sd. We need to override
3432 * the granted access before we call set_sd
3433 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3434 */
3435
3436 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3437 && lp_nt_acl_support(SNUM(conn))) {
3438
3439 uint32_t sec_info_sent;
3440 uint32_t saved_access_mask = fsp->access_mask;
3441
3442 sec_info_sent = get_sec_info(sd);
3443
3444 fsp->access_mask = FILE_GENERIC_ALL;
3445
3446 /* Convert all the generic bits. */
3447 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3448 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3449
3450 if (sec_info_sent & (SECINFO_OWNER|
3451 SECINFO_GROUP|
3452 SECINFO_DACL|
3453 SECINFO_SACL)) {
3454 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3455 }
3456
3457 fsp->access_mask = saved_access_mask;
3458
3459 if (!NT_STATUS_IS_OK(status)) {
3460 goto fail;
3461 }
3462 }
3463
3464 if ((ea_list != NULL) &&
3465 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3466 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3467 if (!NT_STATUS_IS_OK(status)) {
3468 goto fail;
3469 }
3470 }
3471
3472 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3473 status = NT_STATUS_ACCESS_DENIED;
3474 goto fail;
3475 }
3476
3477 /* Save the requested allocation size. */
3478 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3479 if (allocation_size
3480 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3481 fsp->initial_allocation_size = smb_roundup(
3482 fsp->conn, allocation_size);
3483 if (fsp->is_directory) {
3484 /* Can't set allocation size on a directory. */
3485 status = NT_STATUS_ACCESS_DENIED;
3486 goto fail;
3487 }
3488 if (vfs_allocate_file_space(
3489 fsp, fsp->initial_allocation_size) == -1) {
3490 status = NT_STATUS_DISK_FULL;
3491 goto fail;
3492 }
3493 } else {
3494 fsp->initial_allocation_size = smb_roundup(
3495 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3496 }
3497 }
3498
3499 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3500
3501 *result = fsp;
3502 if (pinfo != NULL) {
3503 *pinfo = info;
3504 }
3505
3506 smb_fname->st = fsp->fsp_name->st;
3507
3508 return NT_STATUS_OK;
3509
3510 fail:
3511 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3512
3513 if (fsp != NULL) {
3514 if (base_fsp && fsp->base_fsp == base_fsp) {
3515 /*
3516 * The close_file below will close
3517 * fsp->base_fsp.
3518 */
3519 base_fsp = NULL;
3520 }
3521 close_file(req, fsp, ERROR_CLOSE);
3522 fsp = NULL;
3523 }
3524 if (base_fsp != NULL) {
3525 close_file(req, base_fsp, ERROR_CLOSE);
3526 base_fsp = NULL;
3527 }
3528 return status;
3529 }
3530
3531 /*
3532 * Calculate the full path name given a relative fid.
3533 */
3534 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3535 struct smb_request *req,
3536 uint16_t root_dir_fid,
3537 const struct smb_filename *smb_fname,
3538 struct smb_filename **smb_fname_out)
3539 {
3540 files_struct *dir_fsp;
3541 char *parent_fname = NULL;
3542 char *new_base_name = NULL;
3543 NTSTATUS status;
3544
3545 if (root_dir_fid == 0 || !smb_fname) {
3546 status = NT_STATUS_INTERNAL_ERROR;
3547 goto out;
3548 }
3549
3550 dir_fsp = file_fsp(req, root_dir_fid);
3551
3552 if (dir_fsp == NULL) {
3553 status = NT_STATUS_INVALID_HANDLE;
3554 goto out;
3555 }
3556
3557 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3558 status = NT_STATUS_INVALID_HANDLE;
3559 goto out;
3560 }
3561
3562 if (!dir_fsp->is_directory) {
3563
3564 /*
3565 * Check to see if this is a mac fork of some kind.
3566 */
3567
3568 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3569 is_ntfs_stream_smb_fname(smb_fname)) {
3570 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3571 goto out;
3572 }
3573
3574 /*
3575 we need to handle the case when we get a
3576 relative open relative to a file and the
3577 pathname is blank - this is a reopen!
3578 (hint from demyn plantenberg)
3579 */
3580
3581 status = NT_STATUS_INVALID_HANDLE;
3582 goto out;
3583 }
3584
3585 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3586 /*
3587 * We're at the toplevel dir, the final file name
3588 * must not contain ./, as this is filtered out
3589 * normally by srvstr_get_path and unix_convert
3590 * explicitly rejects paths containing ./.
3591 */
3592 parent_fname = talloc_strdup(talloc_tos(), "");
3593 if (parent_fname == NULL) {
3594 status = NT_STATUS_NO_MEMORY;
3595 goto out;
3596 }
3597 } else {
3598 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3599
3600 /*
3601 * Copy in the base directory name.
3602 */
3603
3604 parent_fname = talloc_array(talloc_tos(), char,
3605 dir_name_len+2);
3606 if (parent_fname == NULL) {
3607 status = NT_STATUS_NO_MEMORY;
3608 goto out;
3609 }
3610 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3611 dir_name_len+1);
3612
3613 /*
3614 * Ensure it ends in a '/'.
3615 * We used TALLOC_SIZE +2 to add space for the '/'.
3616 */
3617
3618 if(dir_name_len
3619 && (parent_fname[dir_name_len-1] != '\\')
3620 && (parent_fname[dir_name_len-1] != '/')) {
3621 parent_fname[dir_name_len] = '/';
3622 parent_fname[dir_name_len+1] = '\0';
3623 }
3624 }
3625
3626 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3627 smb_fname->base_name);
3628 if (new_base_name == NULL) {
3629 status = NT_STATUS_NO_MEMORY;
3630 goto out;
3631 }
3632
3633 status = filename_convert(req,
3634 conn,
3635 req->flags2 & FLAGS2_DFS_PATHNAMES,
3636 new_base_name,
3637 0,
3638 NULL,
3639 smb_fname_out);
3640 if (!NT_STATUS_IS_OK(status)) {
3641 goto out;
3642 }
3643
3644 out:
3645 TALLOC_FREE(parent_fname);
3646 TALLOC_FREE(new_base_name);
3647 return status;
3648 }
3649
3650 NTSTATUS create_file_default(connection_struct *conn,
3651 struct smb_request *req,
3652 uint16_t root_dir_fid,
3653 struct smb_filename *smb_fname,
3654 uint32_t access_mask,
3655 uint32_t share_access,
3656 uint32_t create_disposition,
3657 uint32_t create_options,
3658 uint32_t file_attributes,
3659 uint32_t oplock_request,
3660 uint64_t allocation_size,
3661 uint32_t private_flags,
3662 struct security_descriptor *sd,
3663 struct ea_list *ea_list,
3664 files_struct **result,
3665 int *pinfo)
3666 {
3667 int info = FILE_WAS_OPENED;
3668 files_struct *fsp = NULL;
3669 NTSTATUS status;
3670 bool stream_name = false;
3671
3672 DEBUG(10,("create_file: access_mask = 0x%x "
3673 "file_attributes = 0x%x, share_access = 0x%x, "
3674 "create_disposition = 0x%x create_options = 0x%x "
3675 "oplock_request = 0x%x "
3676 "private_flags = 0x%x "
3677 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3678 "fname = %s\n",
3679 (unsigned int)access_mask,
3680 (unsigned int)file_attributes,
3681 (unsigned int)share_access,
3682 (unsigned int)create_disposition,
3683 (unsigned int)create_options,
3684 (unsigned int)oplock_request,
3685 (unsigned int)private_flags,
3686 (unsigned int)root_dir_fid,
3687 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3688
3689 /*
3690 * Calculate the filename from the root_dir_if if necessary.
3691 */
3692
3693 if (root_dir_fid != 0) {
3694 struct smb_filename *smb_fname_out = NULL;
3695 status = get_relative_fid_filename(conn, req, root_dir_fid,
3696 smb_fname, &smb_fname_out);
3697 if (!NT_STATUS_IS_OK(status)) {
3698 goto fail;
3699 }
3700 smb_fname = smb_fname_out;
3701 }
3702
3703 /*
3704 * Check to see if this is a mac fork of some kind.
3705 */
3706
3707 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3708 if (stream_name) {
3709 enum FAKE_FILE_TYPE fake_file_type;
3710
3711 fake_file_type = is_fake_file(smb_fname);
3712
3713 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3714
3715 /*
3716 * Here we go! support for changing the disk quotas
3717 * --metze
3718 *
3719 * We need to fake up to open this MAGIC QUOTA file
3720 * and return a valid FID.
3721 *
3722 * w2k close this file directly after openening xp
3723 * also tries a QUERY_FILE_INFO on the file and then
3724 * close it
3725 */
3726 status = open_fake_file(req, conn, req->vuid,
3727 fake_file_type, smb_fname,
3728 access_mask, &fsp);
3729 if (!NT_STATUS_IS_OK(status)) {
3730 goto fail;
3731 }
3732
3733 ZERO_STRUCT(smb_fname->st);
3734 goto done;
3735 }
3736
3737 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3738 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3739 goto fail;
3740 }
3741 }
3742
3743 /* All file access must go through check_name() */
3744
3745 status = check_name(conn, smb_fname->base_name);
3746 if (!NT_STATUS_IS_OK(status)) {
3747 goto fail;
3748 }
3749
3750 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3751 int ret;
3752 smb_fname->stream_name = NULL;
3753 /* We have to handle this error here. */
3754 if (create_options & FILE_DIRECTORY_FILE) {
3755 status = NT_STATUS_NOT_A_DIRECTORY;
3756 goto fail;
3757 }
3758 if (lp_posix_pathnames()) {
3759 ret = SMB_VFS_LSTAT(conn, smb_fname);
3760 } else {
3761 ret = SMB_VFS_STAT(conn, smb_fname);
3762 }
3763
3764 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3765 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3766 goto fail;
3767 }
3768 }
3769
3770 status = create_file_unixpath(
3771 conn, req, smb_fname, access_mask, share_access,
3772 create_disposition, create_options, file_attributes,
3773 oplock_request, allocation_size, private_flags,
3774 sd, ea_list,
3775 &fsp, &info);
3776
3777 if (!NT_STATUS_IS_OK(status)) {
3778 goto fail;
3779 }
3780
3781 done:
3782 DEBUG(10, ("create_file: info=%d\n", info));
3783
3784 *result = fsp;
3785 if (pinfo != NULL) {
3786 *pinfo = info;
3787 }
3788 return NT_STATUS_OK;
3789
3790 fail:
3791 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3792
3793 if (fsp != NULL) {
3794 close_file(req, fsp, ERROR_CLOSE);
3795 fsp = NULL;
3796 }
3797 return status;
3798 }
reg import